diff --git a/cabal.project b/cabal.project
new file mode 100644
index 000000000..ea8991390
--- /dev/null
+++ b/cabal.project
@@ -0,0 +1,10 @@
+packages: .
+
+-- Suppress warnings from third-party dependencies when building with GHC 9.8+.
+-- These warnings are upstream issues and cannot be fixed in this project.
+package *
+  ghc-options: -w
+
+-- Re-enable warnings for this project only.
+package elm
+  ghc-options: -Wall -Werror
diff --git a/installers/linux/Dockerfile b/installers/linux/Dockerfile
index 3b6df3f61..5cb1c4bf0 100644
--- a/installers/linux/Dockerfile
+++ b/installers/linux/Dockerfile
@@ -15,11 +15,11 @@
 # Delete all unused docker images:
 # $ docker system prune -a
 
-# Use Alpine 3.11 with GHC 8.6.5
-FROM alpine:3.11
+# Use Alpine 3.23 with GHC 9.8.2
+FROM alpine:3.23
 
 # Install packages required to build elm
-RUN apk add --no-cache ghc cabal wget musl-dev zlib-dev zlib-static ncurses-dev ncurses-static
+RUN apk add --no-cache build-base ghc cabal wget musl-dev gmp-dev gmp-static zlib-dev zlib-static ncurses-dev ncurses-static
 
 WORKDIR /elm
 
@@ -28,12 +28,17 @@ COPY builder builder
 COPY compiler compiler
 COPY reactor reactor
 COPY terminal terminal
-COPY cabal.config elm.cabal LICENSE ./
+COPY cabal.config cabal.project elm.cabal LICENSE ./
+
+# Build sendfile64 shim: musl only has sendfile; snap-server references sendfile64 (glibc-only)
+COPY installers/linux/sendfile64.c /tmp/sendfile64.c
+RUN cc -c /tmp/sendfile64.c -o /tmp/sf64.o \
+    && ar rcs /usr/lib/libsf64.a /tmp/sf64.o
 
 # Build statically linked elm binary
 RUN cabal new-update
-RUN cabal new-build --ghc-option=-optl=-static --ghc-option=-split-sections
-RUN cp ./dist-newstyle/build/x86_64-linux/ghc-*/elm-*/x/elm/build/elm/elm /usr/local/bin/elm
+RUN cabal new-build --enable-executable-static --ghc-option=-split-sections --ghc-option=-optl=-lsf64
+RUN cp ./dist-newstyle/build/*-linux/ghc-*/elm-*/x/elm/build/elm/elm /usr/local/bin/elm
 
 # Remove debug symbols to optimize the binary size
 RUN strip -s /usr/local/bin/elm
diff --git a/installers/linux/sendfile64.c b/installers/linux/sendfile64.c
new file mode 100644
index 000000000..97cd514ee
--- /dev/null
+++ b/installers/linux/sendfile64.c
@@ -0,0 +1,8 @@
+/* Shim for musl libc: snap-server references sendfile64 (a glibc extension).
+ * On musl, off_t is always 64-bit, so sendfile and sendfile64 are identical. */
+#include <sys/sendfile.h>
+
+ssize_t sendfile64(int out_fd, int in_fd, off_t *offset, size_t count)
+{
+    return sendfile(out_fd, in_fd, offset, count);
+}