cmus: remove clangGCC hack

The compiler is overridable using the HOSTCC flag, so no hacks such as creating a fake gcc is needed.

pkgs/applications/audio/cmus/default.nix

@@ -88,14 +88,6 @@ let
 
     #(mkFlag vtxSupport    "CONFIG_VTX=y"     libayemu)
   ];
-
-  clangGCC = runCommand "clang-gcc" {} ''
-    #! ${stdenv.shell}
-    mkdir -p $out/bin
-    ln -s ${stdenv.cc}/bin/clang $out/bin/gcc
-    ln -s ${stdenv.cc}/bin/clang++ $out/bin/g++
-  '';
-
 in
 
 stdenv.mkDerivation rec {
@@ -111,17 +103,18 @@ stdenv.mkDerivation rec {
 
   patches = [ ./option-debugging.patch ];
 
-  configurePhase = "./configure " + lib.concatStringsSep " " ([
-    "prefix=$out"
-    "CONFIG_WAV=y"
-  ] ++ lib.concatMap (a: a.flags) opts);
-
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ ncurses ]
-    ++ lib.optional stdenv.cc.isClang clangGCC
     ++ lib.optionals stdenv.isDarwin [ libiconv CoreAudio AudioUnit VideoToolbox ]
     ++ lib.flatten (lib.concatMap (a: a.deps) opts);
 
+  prefixKey = "prefix=";
+
+  configureFlags = [
+    "CONFIG_WAV=y"
+    "HOSTCC=${stdenv.cc.targetPrefix}cc"
+  ] ++ lib.concatMap (a: a.flags) opts;
+
   makeFlags = [ "LD=$(CC)" ];
 
   meta = with lib; {