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-rw-r--r--pkgs/development/tools/parsing/happy/1.18.5.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/tools/parsing/happy/1.18.5.nix b/pkgs/development/tools/parsing/happy/1.18.5.nix
index d64d8983e9cb..7463a9f94a0a 100644
--- a/pkgs/development/tools/parsing/happy/1.18.5.nix
+++ b/pkgs/development/tools/parsing/happy/1.18.5.nix
@@ -8,6 +8,7 @@ cabal.mkDerivation (self: {
   isExecutable = true;
   buildDepends = [ mtl ];
   buildTools = [ perl ];
+  patches = [ ./adapt-crazy-perl-regex-for-cpp-4.8.0.patch ];
   meta = {
     homepage = "http://www.haskell.org/happy/";
     description = "Happy is a parser generator for Haskell";