nix: bump GHC tooling for 9.12

Author: mgmeier

nix/pkgs.nix

@@ -40,16 +40,19 @@ in with final;
       }
   ;
 
-  cabal = haskell-nix.cabal-install.${compiler-nix-name};
+  cabal = haskell-nix.tool compiler-nix-name "cabal" {
+    version = "latest";
+    index-state = "2025-10-17T00:26:22Z";
+  };
 
-  hlint = haskell-nix.tool "ghc96" "hlint" {
-    version = "3.8";
-    index-state = "2025-04-22T00:00:00Z";
+  hlint = haskell-nix.tool compiler-nix-name "hlint" {
+    version = "latest";
+    index-state = "2025-10-17T00:26:22Z";
   };
 
   ghcid = haskell-nix.tool compiler-nix-name "ghcid" {
-    version = "0.8.7";
-    index-state = "2024-12-24T12:56:48Z";
+    version = "latest";
+    index-state = "2025-10-17T00:26:22Z";
   };
 
   # The ghc-hls point release compatibility table is documented at:
@@ -64,6 +67,7 @@ in with final;
       ghc963 = haskell-nix.sources."hls-2.5";
       ghc964 = haskell-nix.sources."hls-2.6";
       ghc981 = haskell-nix.sources."hls-2.6";
+      ghc912 = haskell-nix.sources."hls-2.12";
     }.${compiler-nix-name} or haskell-nix.sources."hls-2.10";
     cabalProject = readFile (src + "/cabal.project");
     sha256map."https://github.com/pepeiborra/ekg-json"."7a0af7a8fd38045fd15fb13445bdcc7085325460" = "sha256-fVwKxGgM0S4Kv/4egVAAiAjV7QB5PBqMVMCfsv7otIQ=";
@@ -74,9 +78,10 @@ in with final;
     index-state = "2024-12-24T12:56:48Z";
   };
 
+  # profiteur package is in dire need of a maintenance release / package bumps for GHC9.12. Excluding it for now.
   profiteur = haskell-nix.tool compiler-nix-name "profiteur" {
     cabalProjectLocal = ''
-      allow-newer: profiteur:base, ghc-prof:base
+      allow-newer: profiteur:base, profiteur:text, profiteur:aeson, ghc-prof:base
     '';
   };
 

nix/workbench/shell.nix

@@ -103,7 +103,8 @@ project.shellFor {
     weeder
     nix
     (pkgs.pkg-config or pkgconfig)
-    pkgs.profiteur
+    # profiteur package is in dire need of a maintenance release / package bumps for GHC9.12. Excluding it for now.
+    # pkgs.profiteur
     profiterole
     ghc-prof-flamegraph
     sqlite-interactive