cabal2nix: add pname and version, also move to by-name

pkgs/by-name/ca/cabal2nix/package.nix

@@ -0,0 +1,21 @@
+{
+  lib,
+  symlinkJoin,
+  cabal2nix-unwrapped,
+  makeWrapper,
+  nix-prefetch-scripts,
+}:
+
+symlinkJoin {
+  inherit (cabal2nix-unwrapped) pname version meta;
+  nativeBuildInputs = [ makeWrapper ];
+  paths = [ cabal2nix-unwrapped ];
+  postBuild = ''
+    wrapProgram $out/bin/cabal2nix \
+      --prefix PATH ":" "${
+        lib.makeBinPath [
+          nix-prefetch-scripts
+        ]
+      }"
+  '';
+}

pkgs/top-level/all-packages.nix

@@ -1653,20 +1653,6 @@ with pkgs;
     haskellPackages.generateOptparseApplicativeCompletions [ "cabal2nix" ] haskellPackages.cabal2nix
   );
 
-  cabal2nix = symlinkJoin {
-    inherit (cabal2nix-unwrapped) name meta;
-    nativeBuildInputs = [ buildPackages.makeWrapper ];
-    paths = [ cabal2nix-unwrapped ];
-    postBuild = ''
-      wrapProgram $out/bin/cabal2nix \
-        --prefix PATH ":" "${
-          lib.makeBinPath [
-            nix-prefetch-scripts
-          ]
-        }"
-    '';
-  };
-
   stack2nix =
     with haskell.lib;
     overrideCabal (justStaticExecutables haskellPackages.stack2nix) (_: {