Add expression for cabal-delete

pkgs/development/tools/haskell/cabal-delete/default.nix

@@ -0,0 +1,34 @@
+{ cabal, fetchgit, bytestring ? null, containers ? null, directory ? null,
+  filepath, process ? null, attoparsec, ghcPaths, transformers }:
+
+let
+  tag = "0.5.2.0";
+in
+
+cabal.mkDerivation (self: {
+  pname = "cabal-delete";
+  version = "${tag}";
+  src = fetchgit {
+    url = git://github.com/iquiw/cabal-delete.git;
+    rev = "refs/tags/v${tag}";
+    sha256 = "1ap319isjg8bafm4jz2krfwvvg11hj5yk0g99a3l1a3a36hpdgzw";
+  };
+  isLibrary = false;
+  isExecutable = true;
+  buildDepends = [
+      bytestring
+      containers
+      directory
+      filepath
+      process
+      attoparsec
+      ghcPaths
+      transformers
+  ];
+  meta = {
+    homepage = "https://github.com/iquiw/cabal-delete";
+    description = "Uninstall packages installed by cabal";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})

pkgs/top-level/haskell-packages.nix

@@ -2994,6 +2994,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     });
   in callPackage cabalExpr { inherit src; };
 
+  cabalDelete = callPackage ../development/tools/haskell/cabal-delete {};
+
   cabalDev = callPackage ../development/tools/haskell/cabal-dev {};
 
   cabal2Ghci = callPackage ../development/tools/haskell/cabal2ghci {};