diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index c7cd466280..344ebbc623 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -89,6 +89,10 @@ jobs:
 
     - uses: actions/checkout@v6
 
+    - name: Configure Git to support long file paths on Windows
+      if: ${{ matrix.sys.os == 'windows-latest' }}
+      run: git config --system core.longpaths true
+
     - name: Cache and install Cabal dependencies
       uses: input-output-hk/cardano-dev/actions/cabal-cache@cabal-cache-0.0.1.0
       with:
diff --git a/cabal.project b/cabal.project
index f65f103823..092feecacb 100644
--- a/cabal.project
+++ b/cabal.project
@@ -13,8 +13,8 @@ repository cardano-haskell-packages
 -- See CONTRIBUTING for information about these, including some Nix commands
 -- you need to run if you change them
 index-state:
-  , hackage.haskell.org 2026-06-10T14:43:25Z
-  , cardano-haskell-packages 2026-06-29T12:05:19Z
+  , hackage.haskell.org 2026-07-15T21:58:35Z
+  , cardano-haskell-packages 2026-06-30T00:00:00Z
 
 packages:
   cardano-cli
@@ -100,8 +100,8 @@ if impl(ghc >= 9.14)
 source-repository-package
   type: git
   location: https://github.com/IntersectMBO/cardano-api
-  tag: cc4dfe71536d59cb745e8ce1c09ee83dfcde6218
-  --sha256: sha256-n6WJd5w3NSMICUBwefgix2/f+z5La4dkn59dDO4zlHo=
+  tag: 947645ea9c912da13feadc16bef44a7550c3c55b
+  --sha256: sha256-+fIsJuJV4YBSPdVe3wpIxq9lf6nAI5yB7qdzH0iKmrc=
   subdir:
     cardano-api
     cardano-api-gen
@@ -133,8 +133,8 @@ source-repository-package
 source-repository-package
   type: git
   location: https://github.com/f-f/kes-agent.git
-  tag: 32c1ed675d22a30735d9f22f7afa436a3ef3e64a
-  --sha256: sha256-o7hFX1JnraS6Xq0WoXQwd9Z8GsPPv0Ls2DWvZ08o0ZU=
+  tag: c0d24ab8bf8f9f736aed3c7028534355fb89ecaa
+  --sha256: sha256-T3rDZ38iMuE7SZpttHX6yTJYqWqdyw6Qsh5irs1d2T8=
   subdir:
     kes-agent
     kes-agent-crypto
@@ -146,6 +146,12 @@ source-repository-package
   tag: e790deca75b4f72e57a1e36c2775bf4111220450
   --sha256: sha256-W64c1D44drtWNnUI6Nq5YP6X2LhRNEiJu1MM+d+Rp2s=
 
+-- ouroboros-consensus uses deprecated cardano-ledger API (Validated, applyTx).
+-- Suppress deprecation warnings to match the nix build behavior (which only
+-- applies -Werror to cardano-api, not to external packages).
+package ouroboros-consensus
+  ghc-options: -Wno-deprecations
+
 -- Points to ouroboros-network/leios-prototype
 source-repository-package
   type: git
@@ -156,3 +162,13 @@ source-repository-package
     ouroboros-network
     cardano-diffusion
     network-mux
+
+source-repository-package
+  type: git
+  location: https://github.com/IntersectMBO/plutus.git
+  tag: b1db04cc425fab303ac3b79d7140dc2a17f29e6d
+  --sha256: sha256-XtYzjNVx4+IGWpgm+p/YTf56DrJtK0I98umZCTE3U80=
+  subdir:
+    plutus-core
+    plutus-ledger-api
+    plutus-tx
diff --git a/flake.lock b/flake.lock
index 4d645ddad1..80910a281b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,11 +3,11 @@
     "CHaP": {
       "flake": false,
       "locked": {
-        "lastModified": 1782769557,
-        "narHash": "sha256-tCYMTwH15mNajHybvC3KGVPBPMlLlqIOYE0ZgcqRkJU=",
+        "lastModified": 1784570152,
+        "narHash": "sha256-eOcU6GF5Skq/WkBdfCgKIyTzgAjWo1WjbVsR5xDzunI=",
         "owner": "intersectmbo",
         "repo": "cardano-haskell-packages",
-        "rev": "3ee6b1ecce230d62f0083590f38c4ae3457da226",
+        "rev": "f77658bfbf42886478e7a34a1522949cdfc639a3",
         "type": "github"
       },
       "original": {
@@ -209,11 +209,11 @@
     "hackageNix": {
       "flake": false,
       "locked": {
-        "lastModified": 1782835970,
-        "narHash": "sha256-lsdKNBUm/zXoWYcQyGfftI+342KsQMGV2sycjFE0KaY=",
+        "lastModified": 1785176039,
+        "narHash": "sha256-ipFrmX/6MUChWWoLLn68CW5LR8HCW3YO6TsUy+P2SUI=",
         "owner": "input-output-hk",
         "repo": "hackage.nix",
-        "rev": "bf06a772a218913ff6ea903b7523d239960aec5d",
+        "rev": "523dd179d788a26844f2816d0a66597f531d937a",
         "type": "github"
       },
       "original": {
@@ -764,6 +764,25 @@
         "type": "github"
       }
     },
+    "ouroboros-consensus": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1784650797,
+        "narHash": "sha256-NAokIKE0yOW5EIx6zFgvuwa95iD4vzIq13CJOUUe0mA=",
+        "ref": "refs/heads/main",
+        "rev": "3511ac5ad2ded55553d821e7305a2c10e1cfbeca",
+        "revCount": 11479,
+        "submodules": true,
+        "type": "git",
+        "url": "https://github.com/input-output-hk/ouroboros-consensus"
+      },
+      "original": {
+        "rev": "3511ac5ad2ded55553d821e7305a2c10e1cfbeca",
+        "submodules": true,
+        "type": "git",
+        "url": "https://github.com/input-output-hk/ouroboros-consensus"
+      }
+    },
     "pre-commit-hooks": {
       "inputs": {
         "flake-compat": "flake-compat_2",
@@ -796,6 +815,7 @@
           "haskellNix",
           "nixpkgs-unstable"
         ],
+        "ouroboros-consensus": "ouroboros-consensus",
         "pre-commit-hooks": "pre-commit-hooks",
         "unstable": "unstable"
       }
diff --git a/flake.nix b/flake.nix
index 1e89bc16ae..40c620127f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,6 +23,13 @@
       url = "github:intersectmbo/cardano-haskell-packages?ref=repo";
       flake = false;
     };
+
+    # Fetched with submodules=1 so that cardano-blueprint is available during
+    # cabal project evaluation (haskell.nix's fetchgit does not fetch submodules).
+    ouroboros-consensus = {
+      url = "git+https://github.com/input-output-hk/ouroboros-consensus?rev=3511ac5ad2ded55553d821e7305a2c10e1cfbeca&submodules=1";
+      flake = false;
+    };
   };
 
   outputs = inputs: let
@@ -165,6 +172,9 @@
           #
           inputMap = {
             "https://chap.intersectmbo.org/" = inputs.CHaP;
+            # Provide ouroboros-consensus with submodules so cardano-blueprint
+            # files are available during cabal project evaluation.
+            "https://github.com/input-output-hk/ouroboros-consensus" = inputs.ouroboros-consensus;
           };
           shell = {
             packages = p: [p.cardano-cli p.cardano-ledger-core p.cardano-api p.ouroboros-consensus];
@@ -182,7 +192,7 @@
                 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 pv] ++ (lib.optional isDarwin macOS-security);
             # disable Hoogle until someone request it
             withHoogle = false;
             # Skip cross compilers for the shell
@@ -207,13 +217,18 @@
               ...
             }: let
               cliExe = "${config.hsPkgs.cardano-cli.components.exes.cardano-cli}/bin/cardano-cli${pkgs.stdenv.hostPlatform.extensions.executable}";
-              needsQemu = pkgs.stdenv.hostPlatform.isLinux
+              needsQemu =
+                pkgs.stdenv.hostPlatform.isLinux
                 && pkgs.stdenv.hostPlatform != pkgs.stdenv.buildPlatform
                 && pkgs.stdenv.hostPlatform.parsed.cpu.name != pkgs.stdenv.buildPlatform.parsed.cpu.name;
               qemuWrapped = pkgs.buildPackages.writeShellScript "cardano-cli-qemu" ''
                 exec ${pkgs.buildPackages.qemu}/bin/qemu-${pkgs.stdenv.hostPlatform.qemuArch} ${cliExe} "$@"
               '';
-              exportCliPath = "export CARDANO_CLI=${if needsQemu then qemuWrapped else cliExe}";
+              exportCliPath = "export CARDANO_CLI=${
+                if needsQemu
+                then qemuWrapped
+                else cliExe
+              }";
               mainnetConfigFiles = [
                 "configuration/cardano/mainnet-config.yaml"
                 "configuration/cardano/mainnet-config.json"