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-rw-r--r--pkgs/development/tools/analysis/spin/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/tools/analysis/spin/default.nix b/pkgs/development/tools/analysis/spin/default.nix
index 62182d0b84567..e21ae8e927385 100644
--- a/pkgs/development/tools/analysis/spin/default.nix
+++ b/pkgs/development/tools/analysis/spin/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Formal verification tool for distributed software systems";
     homepage = http://spinroot.com/;
-    license = "free";
+    license = stdenv.lib.licenses.free;
     maintainers = with maintainers; [ mornfall pSub ];
   };
 }