WIP jailbreak-cabal

pkgs/development/compilers/ghc/head.nix

@@ -186,8 +186,8 @@ stdenv.mkDerivation (rec {
 
   src = fetchgit {
     url = "https://gitlab.haskell.org/ghc/ghc.git/";
-    rev = "cc635da167fdec2dead0603b0026cb841f0aa645";
-    sha256 = "1lj76l546zriwkcn2r7i5a4j35bx9fh5iggwfz2xvhh8aq8j2i46";
+    rev = "d85c7dcb7c457efc23b20ac8f4e4ae88bae5b050";
+    sha256 = "sha256-Ez8P2G/mYG45wajk2QnObmrJsiHOuC6qhCT76R/RhYE=";
   };
 
   enableParallelBuilding = true;

pkgs/development/haskell-modules/configuration-ghc-head.nix

@@ -74,4 +74,6 @@ self: super: {
   # Break out of "yaml >=0.10.4.0 && <0.11": https://github.com/commercialhaskell/stack/issues/4485
   stack = doJailbreak super.stack;
 
+  jailbreak-cabal = appendPatch ./patches/jailbreak-Cabal-syntax.patch super.jailbreak-cabal;
+
 }

pkgs/development/haskell-modules/patches/jailbreak-Cabal-syntax.patch

@@ -0,0 +1,16 @@
+diff --git a/jailbreak-cabal.cabal b/jailbreak-cabal.cabal
+index d34c616..10be8d4 100644
+--- a/jailbreak-cabal.cabal
++++ b/jailbreak-cabal.cabal
+@@ -21,5 +21,10 @@ source-repository head
+ 
+ executable jailbreak-cabal
+   main-is: Main.hs
+-  build-depends: base < 5, Cabal == 3.*
++  build-depends:
++    base < 5,
++    Cabal == 3.*
++  if impl(ghc >= 9.3)
++    build-depends:
++      Cabal-syntax
+   default-language: Haskell2010