haskell-yi: clean-up + meta

pkgs/applications/editors/yi/wrapper.nix

@@ -26,4 +26,11 @@ stdenv.mkDerivation {
   # For hacking purposes
   env = yiEnv;
 
+  meta = with stdenv.lib; {
+    description = "Allows Yi to find libraries and the compiler easily.";
+    # This wrapper and wrapper only is under PD
+    license = licenses.publicDomain;
+    maintainers = with maintainers; [ fuuzetsu ];
+  };
+
 }

pkgs/applications/editors/yi/yi-custom.nix

@@ -1,40 +0,0 @@
-# This is a manually-written expression over an in-tree cabal file.
-# It's awkward but this way allows the package user to pass in
-# extraPackages without much extra hassle on their end, similarly how
-# the XMonad service handles it: the difference is that we don't have
-# anything like XMONAD_GHC…
-#
-# The idea is that the user changes their configs using any libraries
-# he likes and then builds it using this expression. Once that's done,
-# ‘reload’ and similar functions should all work as long as the user
-# doesn't need new libraries at which point they should add them to
-# extraPackages and rebuild from the expression.
-{ cabal, yi, extraPackages, makeWrapper, ghcWithPackages }:
-let
-  w = ghcWithPackages (self: [ yi ] ++ extraPackages self);
-  wrappedGhc = w.override { ignoreCollisions = true; };
-in
-cabal.mkDerivation (self: rec {
-  pname = "yi-custom";
-  version = "0.0.0.1";
-  src = ./yi-custom-cabal;
-  isLibrary = true;
-  buildDepends = [ yi ];
-  buildTools = [ makeWrapper ];
-  noHaddock = true;
-  doCheck = false;
-
-  postInstall = ''
-    makeWrapper ${yi}/bin/yi $out/bin/yi \
-      --set NIX_GHC ${wrappedGhc}/bin/ghc \
-      --set NIX_GHC_LIBDIR ${wrappedGhc}/lib/ghc-${self.ghc.version}
-  '';
-  meta = {
-    homepage = "http://haskell.org/haskellwiki/Yi";
-    description = "Wrapper over user-specified Haskell libraries for use in Yi config";
-    license = self.stdenv.lib.licenses.publicDomain;
-    platforms = self.ghc.meta.platforms;
-    maintainers = with self.stdenv.lib.maintainers; [ fuuzetsu ];
-  };
-
-})