* Hacked up a patch to let lcov find source files referenced by a

path relative to some arbitrary parent of the .gcno file.  For
  instance, this happens when building Subversion with coverage.

svn path=/nixpkgs/trunk/; revision=16902

pkgs/development/tools/analysis/lcov/default.nix

@@ -8,6 +8,8 @@ stdenv.mkDerivation rec {
     sha256 = "1cx3haizs0rw6wjsn486qcn50f3qpybflkkb1780cg6s8jzcwdin";
   };
 
+  patches = [ ./find-source.patch ];
+
   preBuild = ''
     makeFlagsArray=(PREFIX=$out BIN_DIR=$out/bin MAN_DIR=$out/share/man)
   '';