diff --git a/pkgs/development/libraries/science/math/parmetis/default.nix b/pkgs/development/libraries/science/math/parmetis/default.nix
index 6091031a115a..ca35ce2f4134 100644
--- a/pkgs/development/libraries/science/math/parmetis/default.nix
+++ b/pkgs/development/libraries/science/math/parmetis/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     description = "ParMETIS is an MPI-based parallel library that implements a variety of algorithms for partitioning unstructured graphs, meshes, and for computing fill-reducing orderings of sparse matrices";
     homepage = http://glaros.dtc.umn.edu/gkhome/metis/parmetis/overview;
     platforms = platforms.all;
-    license = licenses.cc-by-nc-sa-20;
+    license = licenses.unfree;
     maintainers = [ maintainers.costrouc ];
   };
 }