diff --git a/pkgs/development/tools/parsing/re2c/default.nix b/pkgs/development/tools/parsing/re2c/default.nix
index 6d74656d616..fbbe0bb5d99 100644
--- a/pkgs/development/tools/parsing/re2c/default.nix
+++ b/pkgs/development/tools/parsing/re2c/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   name = "re2c-${version}";
   version = "0.16";
 
-  sourceRoot = "re2c/re2c";
+  sourceRoot = "${src.name}/re2c";
 
   src = fetchFromGitHub {
     owner = "skvadrik";