Build static binary

flake.nix

@@ -26,6 +26,16 @@
           # And some build configuration.
           # See https://nixos.org/manual/nixpkgs/unstable/#haskell-packaging-helpers.
           [
+            compose.disableSharedExecutables
+            compose.disableSharedLibraries
+            (compose.appendConfigureFlags [
+              "--ghc-option=-optl=-static"
+              "--ghc-option=-optl=-pthread"
+              "--ghc-option=-optl=-L${pkgs.gmp6.override { withStatic = true; }}/lib"
+              "--ghc-option=-optl=-L${pkgs.zlib.static}/lib"
+              "--ghc-option=-optl=-L${pkgs.glibc.static}/lib"
+              "--extra-lib-dirs=${pkgs.libffi.overrideAttrs (old: { dontDisableStatic = true; })}/lib"
+            ])
             # Remove warp which pulls GHC into the runtime deps for some reason.
             (compose.overrideCabal (drv: {
               postInstall = ''