diff --git a/pkgs/tools/system/plan9port/default.nix b/pkgs/tools/system/plan9port/default.nix
index 8ff6c65f8b4b..39dba1c182db 100644
--- a/pkgs/tools/system/plan9port/default.nix
+++ b/pkgs/tools/system/plan9port/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     homepage = "http://swtch.com/plan9port/";
     description = "Plan 9 from User Space";
-    license = licenses.lpl102;
+    license = licenses.lpl-102;
     platforms = platforms.unix;
   };