nix: pin hsie at GHC 9.4

This needs more involved changes in the hsie source code, which can be
deferred to later.

Author: wolfgangwalther

default.nix

@@ -104,9 +104,7 @@ rec {
 
   # Tooling for analyzing Haskell imports and exports.
   hsie =
-    pkgs.callPackage nix/hsie {
-      inherit (pkgs.haskell.packages."${compiler}") ghcWithPackages;
-    };
+    pkgs.callPackage nix/hsie { };
 
   ### Tools
 

nix/hsie/default.nix

@@ -1,4 +1,4 @@
-{ ghcWithPackages
+{ haskell
 , runCommand
 }:
 let
@@ -14,7 +14,7 @@ let
     ps.ghc-paths
     ps.optparse-applicative
   ];
-  ghc = ghcWithPackages modules;
+  ghc = haskell.packages.ghc94.ghcWithPackages modules;
   hsie =
     runCommand "haskellimports" { inherit name src; }
       ''