diff --git a/.changes/20260724_235840_cardano-cli_pablo.lamela_add_herald_to_devshell.yml b/.changes/20260724_235840_cardano-cli_pablo.lamela_add_herald_to_devshell.yml
new file mode 100644
index 0000000000..112a58602e
--- /dev/null
+++ b/.changes/20260724_235840_cardano-cli_pablo.lamela_add_herald_to_devshell.yml
@@ -0,0 +1,5 @@
+description: Add herald, the changelog fragment tool, to the nix development shell
+kind:
+- maintenance
+pr: 1400
+project: cardano-cli
diff --git a/flake.lock b/flake.lock
index 6d0ead243c..82177bb8e9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -33,6 +33,22 @@
         "type": "github"
       }
     },
+    "HTTP_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1451647621,
+        "narHash": "sha256-oHIyw3x0iKBexEo49YeUDV1k74ZtyYKGR2gNJXXRxts=",
+        "owner": "phadej",
+        "repo": "HTTP",
+        "rev": "9bc0996d412fef1787449d841277ef663ad9a915",
+        "type": "github"
+      },
+      "original": {
+        "owner": "phadej",
+        "repo": "HTTP",
+        "type": "github"
+      }
+    },
     "blst": {
       "flake": false,
       "locked": {
@@ -50,6 +66,23 @@
         "type": "github"
       }
     },
+    "blst_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1739372843,
+        "narHash": "sha256-IlbNMLBjs/dvGogcdbWQIL+3qwy7EXJbIDpo4xBd4bY=",
+        "owner": "supranational",
+        "repo": "blst",
+        "rev": "8c7db7fe8d2ce6e76dc398ebd4d475c0ec564355",
+        "type": "github"
+      },
+      "original": {
+        "owner": "supranational",
+        "ref": "v0.3.14",
+        "repo": "blst",
+        "type": "github"
+      }
+    },
     "cabal-34": {
       "flake": false,
       "locked": {
@@ -67,6 +100,23 @@
         "type": "github"
       }
     },
+    "cabal-34_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1645834128,
+        "narHash": "sha256-wG3d+dOt14z8+ydz4SL7pwGfe7SiimxcD/LOuPCV6xM=",
+        "owner": "haskell",
+        "repo": "cabal",
+        "rev": "5ff598c67f53f7c4f48e31d722ba37172230c462",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "3.4",
+        "repo": "cabal",
+        "type": "github"
+      }
+    },
     "cabal-36": {
       "flake": false,
       "locked": {
@@ -84,6 +134,49 @@
         "type": "github"
       }
     },
+    "cabal-36_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1669081697,
+        "narHash": "sha256-I5or+V7LZvMxfbYgZATU4awzkicBwwok4mVoje+sGmU=",
+        "owner": "haskell",
+        "repo": "cabal",
+        "rev": "8fd619e33d34924a94e691c5fea2c42f0fc7f144",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "3.6",
+        "repo": "cabal",
+        "type": "github"
+      }
+    },
+    "cardano-dev": {
+      "inputs": {
+        "haskellNix": "haskellNix",
+        "iohkNix": "iohkNix",
+        "nixpkgs": [
+          "cardano-dev",
+          "haskellNix",
+          "nixpkgs-unstable"
+        ],
+        "systems": "systems",
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1779877044,
+        "narHash": "sha256-9JqO0jbtcDTEskMiT5R3HaH6Wpc/+0MUu+OX6eSrzwQ=",
+        "owner": "input-output-hk",
+        "repo": "cardano-dev",
+        "rev": "1cec349c05fc16bbe11a2a016b8d88185d7ad151",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "cardano-dev",
+        "type": "github"
+      }
+    },
     "cardano-shell": {
       "flake": false,
       "locked": {
@@ -100,6 +193,22 @@
         "type": "github"
       }
     },
+    "cardano-shell_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1608537748,
+        "narHash": "sha256-PulY1GfiMgKVnBci3ex4ptk2UNYMXqGjJOxcPy2KYT4=",
+        "owner": "input-output-hk",
+        "repo": "cardano-shell",
+        "rev": "9392c75087cb9a3d453998f4230930dea3a95725",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "cardano-shell",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -118,6 +227,23 @@
       }
     },
     "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1672831974,
+        "narHash": "sha256-z9k3MfslLjWQfnjBtEtJZdq3H7kyi2kQtUThfTgdRk0=",
+        "owner": "input-output-hk",
+        "repo": "flake-compat",
+        "rev": "45f2638735f8cdc40fe302742b79f248d23eb368",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "ref": "hkm/gitlab-fix",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-compat_3": {
       "flake": false,
       "locked": {
         "lastModified": 1747046372,
@@ -135,7 +261,7 @@
     },
     "flake-utils": {
       "inputs": {
-        "systems": "systems"
+        "systems": "systems_2"
       },
       "locked": {
         "lastModified": 1681378341,
@@ -173,7 +299,40 @@
         "type": "github"
       }
     },
+    "hackage": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1778807596,
+        "narHash": "sha256-3QQWTI6Md7aKhc88vb7dg5jvS+lFXbm0IbYAwHEOLkg=",
+        "owner": "input-output-hk",
+        "repo": "hackage.nix",
+        "rev": "970dbf08cc174c56fef2522c1d21e04eb969a1bf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "hackage.nix",
+        "type": "github"
+      }
+    },
     "hackage-for-stackage": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1778806225,
+        "narHash": "sha256-iy3Juc9g68k2aZTgFQX7kJU1wDUdY2G+YsTRkd+YmIw=",
+        "owner": "input-output-hk",
+        "repo": "hackage.nix",
+        "rev": "db343e074ad11a1431627a8d3817ec574230cd84",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "ref": "for-stackage",
+        "repo": "hackage.nix",
+        "type": "github"
+      }
+    },
+    "hackage-for-stackage_2": {
       "flake": false,
       "locked": {
         "lastModified": 1776300248,
@@ -206,6 +365,22 @@
         "type": "github"
       }
     },
+    "hackage-internal_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1750307553,
+        "narHash": "sha256-iiafNoeLHwlSLQTyvy8nPe2t6g5AV4PPcpMeH/2/DLs=",
+        "owner": "input-output-hk",
+        "repo": "hackage.nix",
+        "rev": "f7867baa8817fab296528f4a4ec39d1c7c4da4f3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "hackage.nix",
+        "type": "github"
+      }
+    },
     "hackageNix": {
       "flake": false,
       "locked": {
@@ -229,9 +404,7 @@
         "cabal-36": "cabal-36",
         "cardano-shell": "cardano-shell",
         "flake-compat": "flake-compat",
-        "hackage": [
-          "hackageNix"
-        ],
+        "hackage": "hackage",
         "hackage-for-stackage": "hackage-for-stackage",
         "hackage-internal": "hackage-internal",
         "hls": "hls",
@@ -251,6 +424,7 @@
         "hpc-coveralls": "hpc-coveralls",
         "iserv-proxy": "iserv-proxy",
         "nixpkgs": [
+          "cardano-dev",
           "haskellNix",
           "nixpkgs-unstable"
         ],
@@ -264,6 +438,62 @@
         "old-ghc-nix": "old-ghc-nix",
         "stackage": "stackage"
       },
+      "locked": {
+        "lastModified": 1778807965,
+        "narHash": "sha256-QWNQB1ZmNk7MA6+WSHkeB7278Ykx0TkCzlY1OMwD8ro=",
+        "owner": "input-output-hk",
+        "repo": "haskell.nix",
+        "rev": "3883823f608fa19fad8c94e0203be37e124b4bed",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "haskell.nix",
+        "type": "github"
+      }
+    },
+    "haskellNix_2": {
+      "inputs": {
+        "HTTP": "HTTP_2",
+        "cabal-34": "cabal-34_2",
+        "cabal-36": "cabal-36_2",
+        "cardano-shell": "cardano-shell_2",
+        "flake-compat": "flake-compat_2",
+        "hackage": [
+          "hackageNix"
+        ],
+        "hackage-for-stackage": "hackage-for-stackage_2",
+        "hackage-internal": "hackage-internal_2",
+        "hls": "hls_2",
+        "hls-1.10": "hls-1.10_2",
+        "hls-2.0": "hls-2.0_2",
+        "hls-2.10": "hls-2.10_2",
+        "hls-2.11": "hls-2.11_2",
+        "hls-2.12": "hls-2.12_2",
+        "hls-2.2": "hls-2.2_2",
+        "hls-2.3": "hls-2.3_2",
+        "hls-2.4": "hls-2.4_2",
+        "hls-2.5": "hls-2.5_2",
+        "hls-2.6": "hls-2.6_2",
+        "hls-2.7": "hls-2.7_2",
+        "hls-2.8": "hls-2.8_2",
+        "hls-2.9": "hls-2.9_2",
+        "hpc-coveralls": "hpc-coveralls_2",
+        "iserv-proxy": "iserv-proxy_2",
+        "nixpkgs": [
+          "haskellNix",
+          "nixpkgs-unstable"
+        ],
+        "nixpkgs-2305": "nixpkgs-2305_2",
+        "nixpkgs-2311": "nixpkgs-2311_2",
+        "nixpkgs-2405": "nixpkgs-2405_2",
+        "nixpkgs-2411": "nixpkgs-2411_2",
+        "nixpkgs-2505": "nixpkgs-2505_2",
+        "nixpkgs-2511": "nixpkgs-2511_2",
+        "nixpkgs-unstable": "nixpkgs-unstable_2",
+        "old-ghc-nix": "old-ghc-nix_2",
+        "stackage": "stackage_2"
+      },
       "locked": {
         "lastModified": 1776322239,
         "narHash": "sha256-1ukEFqqATUajhs9LDVVXdNkPbRz30JzdFM9xqm5oThY=",
@@ -312,147 +542,317 @@
         "type": "github"
       }
     },
-    "hls-2.0": {
+    "hls-1.10_2": {
       "flake": false,
       "locked": {
-        "lastModified": 1687698105,
-        "narHash": "sha256-OHXlgRzs/kuJH8q7Sxh507H+0Rb8b7VOiPAjcY9sM1k=",
+        "lastModified": 1680000865,
+        "narHash": "sha256-rc7iiUAcrHxwRM/s0ErEsSPxOR3u8t7DvFeWlMycWgo=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "783905f211ac63edf982dd1889c671653327e441",
+        "rev": "b08691db779f7a35ff322b71e72a12f6e3376fd9",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.0.0.1",
+        "ref": "1.10.0.0",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.10": {
+    "hls-2.0": {
       "flake": false,
       "locked": {
-        "lastModified": 1743069404,
-        "narHash": "sha256-q4kDFyJDDeoGqfEtrZRx4iqMVEC2MOzCToWsFY+TOzY=",
+        "lastModified": 1687698105,
+        "narHash": "sha256-OHXlgRzs/kuJH8q7Sxh507H+0Rb8b7VOiPAjcY9sM1k=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "2318c61db3a01e03700bd4b05665662929b7fe8b",
+        "rev": "783905f211ac63edf982dd1889c671653327e441",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.10.0.0",
+        "ref": "2.0.0.1",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.11": {
+    "hls-2.0_2": {
       "flake": false,
       "locked": {
-        "lastModified": 1747306193,
-        "narHash": "sha256-/MmtpF8+FyQlwfKHqHK05BdsxC9LHV70d/FiMM7pzBM=",
+        "lastModified": 1687698105,
+        "narHash": "sha256-OHXlgRzs/kuJH8q7Sxh507H+0Rb8b7VOiPAjcY9sM1k=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "46ef4523ea4949f47f6d2752476239f1c6d806fe",
+        "rev": "783905f211ac63edf982dd1889c671653327e441",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.11.0.0",
+        "ref": "2.0.0.1",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.12": {
+    "hls-2.10": {
       "flake": false,
       "locked": {
-        "lastModified": 1758709460,
-        "narHash": "sha256-xkI8MIIVEVARskfWbGAgP5sHG/lyeKnkm0LIOJ19X5w=",
+        "lastModified": 1743069404,
+        "narHash": "sha256-q4kDFyJDDeoGqfEtrZRx4iqMVEC2MOzCToWsFY+TOzY=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "7d983de4fa7ff54369f6dd31444bdb9869aec83e",
+        "rev": "2318c61db3a01e03700bd4b05665662929b7fe8b",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.12.0.0",
+        "ref": "2.10.0.0",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.2": {
+    "hls-2.10_2": {
       "flake": false,
       "locked": {
-        "lastModified": 1693064058,
-        "narHash": "sha256-8DGIyz5GjuCFmohY6Fa79hHA/p1iIqubfJUTGQElbNk=",
+        "lastModified": 1743069404,
+        "narHash": "sha256-q4kDFyJDDeoGqfEtrZRx4iqMVEC2MOzCToWsFY+TOzY=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "b30f4b6cf5822f3112c35d14a0cba51f3fe23b85",
+        "rev": "2318c61db3a01e03700bd4b05665662929b7fe8b",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.2.0.0",
+        "ref": "2.10.0.0",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.3": {
+    "hls-2.11": {
       "flake": false,
       "locked": {
-        "lastModified": 1695910642,
-        "narHash": "sha256-tR58doOs3DncFehHwCLczJgntyG/zlsSd7DgDgMPOkI=",
+        "lastModified": 1747306193,
+        "narHash": "sha256-/MmtpF8+FyQlwfKHqHK05BdsxC9LHV70d/FiMM7pzBM=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "458ccdb55c9ea22cd5d13ec3051aaefb295321be",
+        "rev": "46ef4523ea4949f47f6d2752476239f1c6d806fe",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.3.0.0",
+        "ref": "2.11.0.0",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.4": {
+    "hls-2.11_2": {
       "flake": false,
       "locked": {
-        "lastModified": 1699862708,
-        "narHash": "sha256-YHXSkdz53zd0fYGIYOgLt6HrA0eaRJi9mXVqDgmvrjk=",
+        "lastModified": 1747306193,
+        "narHash": "sha256-/MmtpF8+FyQlwfKHqHK05BdsxC9LHV70d/FiMM7pzBM=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "54507ef7e85fa8e9d0eb9a669832a3287ffccd57",
+        "rev": "46ef4523ea4949f47f6d2752476239f1c6d806fe",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.4.0.1",
+        "ref": "2.11.0.0",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.5": {
+    "hls-2.12": {
       "flake": false,
       "locked": {
-        "lastModified": 1701080174,
-        "narHash": "sha256-fyiR9TaHGJIIR0UmcCb73Xv9TJq3ht2ioxQ2mT7kVdc=",
+        "lastModified": 1758709460,
+        "narHash": "sha256-xkI8MIIVEVARskfWbGAgP5sHG/lyeKnkm0LIOJ19X5w=",
         "owner": "haskell",
         "repo": "haskell-language-server",
-        "rev": "27f8c3d3892e38edaef5bea3870161815c4d014c",
+        "rev": "7d983de4fa7ff54369f6dd31444bdb9869aec83e",
         "type": "github"
       },
       "original": {
         "owner": "haskell",
-        "ref": "2.5.0.0",
+        "ref": "2.12.0.0",
         "repo": "haskell-language-server",
         "type": "github"
       }
     },
-    "hls-2.6": {
+    "hls-2.12_2": {
       "flake": false,
       "locked": {
-        "lastModified": 1705325287,
-        "narHash": "sha256-+P87oLdlPyMw8Mgoul7HMWdEvWP/fNlo8jyNtwME8E8=",
+        "lastModified": 1758709460,
+        "narHash": "sha256-xkI8MIIVEVARskfWbGAgP5sHG/lyeKnkm0LIOJ19X5w=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "7d983de4fa7ff54369f6dd31444bdb9869aec83e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.12.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1693064058,
+        "narHash": "sha256-8DGIyz5GjuCFmohY6Fa79hHA/p1iIqubfJUTGQElbNk=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "b30f4b6cf5822f3112c35d14a0cba51f3fe23b85",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.2.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.2_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1693064058,
+        "narHash": "sha256-8DGIyz5GjuCFmohY6Fa79hHA/p1iIqubfJUTGQElbNk=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "b30f4b6cf5822f3112c35d14a0cba51f3fe23b85",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.2.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.3": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1695910642,
+        "narHash": "sha256-tR58doOs3DncFehHwCLczJgntyG/zlsSd7DgDgMPOkI=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "458ccdb55c9ea22cd5d13ec3051aaefb295321be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.3.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.3_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1695910642,
+        "narHash": "sha256-tR58doOs3DncFehHwCLczJgntyG/zlsSd7DgDgMPOkI=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "458ccdb55c9ea22cd5d13ec3051aaefb295321be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.3.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.4": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1699862708,
+        "narHash": "sha256-YHXSkdz53zd0fYGIYOgLt6HrA0eaRJi9mXVqDgmvrjk=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "54507ef7e85fa8e9d0eb9a669832a3287ffccd57",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.4.0.1",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.4_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1699862708,
+        "narHash": "sha256-YHXSkdz53zd0fYGIYOgLt6HrA0eaRJi9mXVqDgmvrjk=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "54507ef7e85fa8e9d0eb9a669832a3287ffccd57",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.4.0.1",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.5": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1701080174,
+        "narHash": "sha256-fyiR9TaHGJIIR0UmcCb73Xv9TJq3ht2ioxQ2mT7kVdc=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "27f8c3d3892e38edaef5bea3870161815c4d014c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.5.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.5_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1701080174,
+        "narHash": "sha256-fyiR9TaHGJIIR0UmcCb73Xv9TJq3ht2ioxQ2mT7kVdc=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "27f8c3d3892e38edaef5bea3870161815c4d014c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.5.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.6": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1705325287,
+        "narHash": "sha256-+P87oLdlPyMw8Mgoul7HMWdEvWP/fNlo8jyNtwME8E8=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "6e0b342fa0327e628610f2711f8c3e4eaaa08b1e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.6.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.6_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1705325287,
+        "narHash": "sha256-+P87oLdlPyMw8Mgoul7HMWdEvWP/fNlo8jyNtwME8E8=",
         "owner": "haskell",
         "repo": "haskell-language-server",
         "rev": "6e0b342fa0327e628610f2711f8c3e4eaaa08b1e",
@@ -482,6 +882,23 @@
         "type": "github"
       }
     },
+    "hls-2.7_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1708965829,
+        "narHash": "sha256-LfJ+TBcBFq/XKoiNI7pc4VoHg4WmuzsFxYJ3Fu+Jf+M=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "50322b0a4aefb27adc5ec42f5055aaa8f8e38001",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.7.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
     "hls-2.8": {
       "flake": false,
       "locked": {
@@ -499,6 +916,23 @@
         "type": "github"
       }
     },
+    "hls-2.8_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1715153580,
+        "narHash": "sha256-Vi/iUt2pWyUJlo9VrYgTcbRviWE0cFO6rmGi9rmALw0=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "dd1be1beb16700de59e0d6801957290bcf956a0a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.8.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
     "hls-2.9": {
       "flake": false,
       "locked": {
@@ -516,6 +950,39 @@
         "type": "github"
       }
     },
+    "hls-2.9_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1719993701,
+        "narHash": "sha256-wy348++MiMm/xwtI9M3vVpqj2qfGgnDcZIGXw8sF1sA=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "90319a7e62ab93ab65a95f8f2bcf537e34dae76a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.9.0.1",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1741604408,
+        "narHash": "sha256-tuq3+Ip70yu89GswZ7DSINBpwRprnWnl6xDYnS4GOsc=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "682d6894c94087da5e566771f25311c47e145359",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
     "hpc-coveralls": {
       "flake": false,
       "locked": {
@@ -532,6 +999,22 @@
         "type": "github"
       }
     },
+    "hpc-coveralls_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1607498076,
+        "narHash": "sha256-8uqsEtivphgZWYeUo5RDUhp6bO9j2vaaProQxHBltQk=",
+        "owner": "sevanspowell",
+        "repo": "hpc-coveralls",
+        "rev": "14df0f7d229f4cd2e79f8eabb1a740097fdfa430",
+        "type": "github"
+      },
+      "original": {
+        "owner": "sevanspowell",
+        "repo": "hpc-coveralls",
+        "type": "github"
+      }
+    },
     "incl": {
       "inputs": {
         "nixlib": "nixlib"
@@ -557,6 +1040,27 @@
         "secp256k1": "secp256k1",
         "sodium": "sodium"
       },
+      "locked": {
+        "lastModified": 1774280402,
+        "narHash": "sha256-bHp3Ji7c0T0RCor9FVo6yvjSPT0bVQE5EFw5JxvqZDM=",
+        "owner": "input-output-hk",
+        "repo": "iohk-nix",
+        "rev": "f444d972c301ddd9f23eac4325ffcc8b5766eee9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "iohk-nix",
+        "type": "github"
+      }
+    },
+    "iohkNix_2": {
+      "inputs": {
+        "blst": "blst_2",
+        "nixpkgs": "nixpkgs_2",
+        "secp256k1": "secp256k1_2",
+        "sodium": "sodium_2"
+      },
       "locked": {
         "lastModified": 1767797951,
         "narHash": "sha256-74YzTQnjU8zXjFsSGNTElT/JrjEJ+UWxXP4W/aqegKk=",
@@ -588,6 +1092,23 @@
         "type": "github"
       }
     },
+    "iserv-proxy_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1775620557,
+        "narHash": "sha256-10x8/G0x3eR/++XRHPx4MBuqlnc6+N+ajIxXyLkG+nU=",
+        "owner": "stable-haskell",
+        "repo": "iserv-proxy",
+        "rev": "3f7b2815307c20a0dfd816bdf4a39ab86af3e0d4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "stable-haskell",
+        "ref": "iserv-syms",
+        "repo": "iserv-proxy",
+        "type": "github"
+      }
+    },
     "nixlib": {
       "locked": {
         "lastModified": 1667696192,
@@ -635,6 +1156,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2305_2": {
+      "locked": {
+        "lastModified": 1705033721,
+        "narHash": "sha256-K5eJHmL1/kev6WuqyqqbS1cdNnSidIZ3jeqJ7GbrYnQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a1982c92d8980a0114372973cbdfe0a307f1bdea",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-23.05-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-2311": {
       "locked": {
         "lastModified": 1719957072,
@@ -651,6 +1188,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2311_2": {
+      "locked": {
+        "lastModified": 1719957072,
+        "narHash": "sha256-gvFhEf5nszouwLAkT9nWsDzocUTqLWHuL++dvNjMp9I=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7144d6241f02d171d25fba3edeaf15e0f2592105",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-23.11-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-2405": {
       "locked": {
         "lastModified": 1735564410,
@@ -667,6 +1220,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2405_2": {
+      "locked": {
+        "lastModified": 1735564410,
+        "narHash": "sha256-HB/FA0+1gpSs8+/boEavrGJH+Eq08/R2wWNph1sM1Dg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "1e7a8f391f1a490460760065fa0630b5520f9cf8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-24.05-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-2411": {
       "locked": {
         "lastModified": 1751290243,
@@ -683,6 +1252,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2411_2": {
+      "locked": {
+        "lastModified": 1751290243,
+        "narHash": "sha256-kNf+obkpJZWar7HZymXZbW+Rlk3HTEIMlpc6FCNz0Ds=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "5ab036a8d97cb9476fbe81b09076e6e91d15e1b6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-24.11-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-2505": {
       "locked": {
         "lastModified": 1764560356,
@@ -699,6 +1284,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2505_2": {
+      "locked": {
+        "lastModified": 1764560356,
+        "narHash": "sha256-M5aFEFPppI4UhdOxwdmceJ9bDJC4T6C6CzCK1E2FZyo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "6c8f0cca84510cc79e09ea99a299c9bc17d03cb6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-25.05-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-2511": {
       "locked": {
         "lastModified": 1775749320,
@@ -715,6 +1316,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2511_2": {
+      "locked": {
+        "lastModified": 1775749320,
+        "narHash": "sha256-msT6frWJSQ2WR+0cpk+KPcZdLTLagUIsJwQwIX9JNSo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "74b87959b2d16f59f54d8559cf3cf26b9d907949",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-25.11-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1775888245,
@@ -731,7 +1348,39 @@
         "type": "github"
       }
     },
+    "nixpkgs-unstable_2": {
+      "locked": {
+        "lastModified": 1775888245,
+        "narHash": "sha256-nwASzrRDD1JBEu/o8ekKYEXm/oJW6EMCzCRdrwcLe90=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "13043924aaa7375ce482ebe2494338e058282925",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1751071626,
+        "narHash": "sha256-/uHE/AD2qGq4QLigWAnBHiVvpVXB04XAfrOtw8JMv+Y=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "a47938d89bdf8e279ad432bd6a473cf4c430f48c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "release-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
       "locked": {
         "lastModified": 1759070547,
         "narHash": "sha256-JVZl8NaVRYb0+381nl7LvPE+A774/dRpif01FKLrYFQ=",
@@ -764,11 +1413,28 @@
         "type": "github"
       }
     },
+    "old-ghc-nix_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1631092763,
+        "narHash": "sha256-sIKgO+z7tj4lw3u6oBZxqIhDrzSkvpHtv0Kki+lh9Fg=",
+        "owner": "angerman",
+        "repo": "old-ghc-nix",
+        "rev": "af48a7a7353e418119b6dfe3cd1463a657f342b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "angerman",
+        "ref": "master",
+        "repo": "old-ghc-nix",
+        "type": "github"
+      }
+    },
     "pre-commit-hooks": {
       "inputs": {
-        "flake-compat": "flake-compat_2",
+        "flake-compat": "flake-compat_3",
         "gitignore": "gitignore",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_3"
       },
       "locked": {
         "lastModified": 1760663237,
@@ -787,11 +1453,12 @@
     "root": {
       "inputs": {
         "CHaP": "CHaP",
+        "cardano-dev": "cardano-dev",
         "flake-utils": "flake-utils",
         "hackageNix": "hackageNix",
-        "haskellNix": "haskellNix",
+        "haskellNix": "haskellNix_2",
         "incl": "incl",
-        "iohkNix": "iohkNix",
+        "iohkNix": "iohkNix_2",
         "nixpkgs": [
           "haskellNix",
           "nixpkgs-unstable"
@@ -817,6 +1484,23 @@
         "type": "github"
       }
     },
+    "secp256k1_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1683999695,
+        "narHash": "sha256-9nJJVENMXjXEJZzw8DHzin1DkFkF8h9m/c6PuM7Uk4s=",
+        "owner": "bitcoin-core",
+        "repo": "secp256k1",
+        "rev": "acf5c55ae6a94e5ca847e07def40427547876101",
+        "type": "github"
+      },
+      "original": {
+        "owner": "bitcoin-core",
+        "ref": "v0.3.2",
+        "repo": "secp256k1",
+        "type": "github"
+      }
+    },
     "sodium": {
       "flake": false,
       "locked": {
@@ -834,7 +1518,40 @@
         "type": "github"
       }
     },
+    "sodium_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1675156279,
+        "narHash": "sha256-0uRcN5gvMwO7MCXVYnoqG/OmeBFi8qRVnDWJLnBb9+Y=",
+        "owner": "input-output-hk",
+        "repo": "libsodium",
+        "rev": "dbb48cce5429cb6585c9034f002568964f1ce567",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "libsodium",
+        "rev": "dbb48cce5429cb6585c9034f002568964f1ce567",
+        "type": "github"
+      }
+    },
     "stackage": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1778805211,
+        "narHash": "sha256-Nu/V1NuOsz4iteePdkzcufDOY3vhbl7Wl1MhQjUTJc0=",
+        "owner": "input-output-hk",
+        "repo": "stackage.nix",
+        "rev": "6af1a5ac5c3e2ca2261d56696f2d8f8e9220ffdf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "stackage.nix",
+        "type": "github"
+      }
+    },
+    "stackage_2": {
       "flake": false,
       "locked": {
         "lastModified": 1776299261,
@@ -865,6 +1582,21 @@
         "type": "github"
       }
     },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "unstable": {
       "locked": {
         "lastModified": 1771369470,
@@ -879,6 +1611,27 @@
         "ref": "nixos-unstable",
         "type": "indirect"
       }
+    },
+    "utils": {
+      "inputs": {
+        "systems": [
+          "cardano-dev",
+          "systems"
+        ]
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 1e89bc16ae..d13d3c2554 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,7 @@
     incl.url = "github:divnix/incl";
     flake-utils.url = "github:hamishmack/flake-utils/hkm/nested-hydraJobs";
     pre-commit-hooks.url = "github:cachix/git-hooks.nix";
+    cardano-dev.url = "github:input-output-hk/cardano-dev";
 
     CHaP = {
       url = "github:intersectmbo/cardano-haskell-packages?ref=repo";
@@ -182,7 +183,9 @@
                 hlint = {version = "3.10";};
               };
             # and from nixpkgs or other inputs
-            nativeBuildInputs = with nixpkgs; [gh jq yq-go unstable.actionlint shellcheck] ++ (lib.optional isDarwin macOS-security);
+            nativeBuildInputs = with nixpkgs;
+              [gh jq yq-go unstable.actionlint shellcheck inputs.cardano-dev.packages.${system}.herald]
+              ++ (lib.optional isDarwin macOS-security);
             # disable Hoogle until someone request it
             withHoogle = false;
             # Skip cross compilers for the shell