diff --git a/pkgs/applications/editors/vim/configurable.nix b/pkgs/applications/editors/vim/configurable.nix
index 6910f13bb36a..94ae1d9c846a 100644
--- a/pkgs/applications/editors/vim/configurable.nix
+++ b/pkgs/applications/editors/vim/configurable.nix
@@ -31,10 +31,6 @@ let inherit (args.composableDerivation) composableDerivation edf;
   '';
 in
 composableDerivation {
-  # use gccApple to compile on darwin
-  mkDerivation = ( if stdenv.isDarwin
-                   then stdenvAdapters.overrideCC stdenv gccApple
-                   else stdenv ).mkDerivation;
 } (fix: {
 
     name = "vim_configurable-7.4.516";
diff --git a/pkgs/applications/editors/vim/qvim.nix b/pkgs/applications/editors/vim/qvim.nix
index 8c87d3c1e20c..b9e3d668d623 100644
--- a/pkgs/applications/editors/vim/qvim.nix
+++ b/pkgs/applications/editors/vim/qvim.nix
@@ -6,10 +6,6 @@ in
 
 let inherit (args.composableDerivation) composableDerivation edf; in
 composableDerivation {
-  # use gccApple to compile on darwin
-  mkDerivation = ( if stdenv.isDarwin
-                   then stdenvAdapters.overrideCC stdenv gccApple
-                   else stdenv ).mkDerivation;
 } (fix: {
 
     name = "qvim-7.4." + tag;
diff --git a/pkgs/development/compilers/llvm/3.5/dragonegg.nix b/pkgs/development/compilers/llvm/3.5/dragonegg.nix
index 89351842cd2a..0f2d4cd7fb67 100644
--- a/pkgs/development/compilers/llvm/3.5/dragonegg.nix
+++ b/pkgs/development/compilers/llvm/3.5/dragonegg.nix
@@ -1,4 +1,4 @@
-{stdenv, fetch, fetchpatch, llvm, gmp, mpfr, mpc, ncurses, zlib, version}:
+{stdenv, fetch, fetchpatch, llvm, gmp, mpfr, libmpc, ncurses, zlib, version}:
 
 stdenv.mkDerivation rec {
   name = "dragonegg-${version}";
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   # The gcc the plugin will be built for (the same used building dragonegg)
   GCC = "gcc";
 
-  buildInputs = [ llvm gmp mpfr mpc ncurses zlib ];
+  buildInputs = [ llvm gmp mpfr libmpc ncurses zlib ];
 
   installPhase = ''
     mkdir -p $out/lib $out/share/doc/${name}