diff --git a/pkgs/development/libraries/haskell/hflags/default.nix b/pkgs/development/libraries/haskell/hflags/default.nix
index d2ac39f139c5..019815fd57c1 100644
--- a/pkgs/development/libraries/haskell/hflags/default.nix
+++ b/pkgs/development/libraries/haskell/hflags/default.nix
@@ -10,7 +10,7 @@ cabal.mkDerivation (self: {
   meta = {
     homepage = "http://github.com/errge/hflags";
     description = "Command line flag parser, very similar to Google's gflags";
-    license = self.stdenv.lib.licenses.asl20;
+    license = "unknown";
     platforms = self.ghc.meta.platforms;
   };
 })