Disable HLS on some GHC versions

It just don’t work.

Author: sellout

flake.nix

@@ -107,11 +107,15 @@
       devShells =
         {default = inputs.self.devShells.${system}.ghc902;}
         // inputs.self.lib.mkDevShells pkgs supportedGhcVersions cabalPackages
-        (hpkgs: [
-          hpkgs.cabal-install
-          hpkgs.haskell-language-server
-          pkgs.graphviz
-        ]);
+        (hpkgs:
+          [
+            hpkgs.cabal-install
+            pkgs.graphviz
+          ]
+          # Haskell Language Server doesn’t support all GHC versions.
+          ++ pkgs.lib.optional
+          (!(builtins.elem hpkgs.ghc.version ["8107" "924"]))
+          hpkgs.haskell-language-server);
 
       checks = {
         nix-fmt =