haskell-wxc: patch out the attempt to run ldconfig to fix the build

pkgs/development/libraries/haskell/wxHaskell/no-ldconfig.patch

@@ -0,0 +1,10 @@
+Only in wxc-0.91.0.0: dist
+diff -ubr wxc-0.91.0.0-orig/Setup.hs wxc-0.91.0.0/Setup.hs
+--- wxc-0.91.0.0-orig/Setup.hs	2014-10-31 13:30:15.514809137 +0100
++++ wxc-0.91.0.0/Setup.hs	2014-10-31 13:33:53.606372005 +0100
+@@ -507,5 +507,3 @@
+         inst_lib_dir = libdir $ absoluteInstallDirs pkg_descr local_bld_info NoCopyDest
+ 
+     installOrdinaryFile (verbosity flags) (bld_dir </> lib_name) (inst_lib_dir </> lib_name)
+-    ldconfig inst_lib_dir
+-

pkgs/development/libraries/haskell/wxHaskell/wxc.nix

@@ -9,9 +9,7 @@ cabal.mkDerivation (self: {
   buildDepends = [ wxdirect ];
   extraLibraries = [ libX11 mesa wxGTK ];
   noHaddock = true;
-  postInstall = ''
-    cp -v dist/build/libwxc.so.${self.version} $out/lib/libwxc.so
-  '';
+  patches = [ ./no-ldconfig.patch ];
   meta = {
     homepage = "http://haskell.org/haskellwiki/WxHaskell";
     description = "wxHaskell C++ wrapper";