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-rw-r--r--pkgs/development/compilers/mezzo/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/compilers/mezzo/default.nix b/pkgs/development/compilers/mezzo/default.nix
index a0fe441b153..67e7c932e55 100644
--- a/pkgs/development/compilers/mezzo/default.nix
+++ b/pkgs/development/compilers/mezzo/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
     homepage = http://protz.github.io/mezzo/;
     description = "A programming language in the ML tradition, which places strong emphasis on the control of aliasing and access to mutable memory";
     license = licenses.gpl2;
-    platforms = ocaml.meta.platforms;
+    platforms = ocaml.meta.platforms or [];
   };
 }