diff --git a/pkgs/applications/radio/freedv/default.nix b/pkgs/applications/radio/freedv/default.nix
index 43cf58db2581..33bb9236bd93 100644
--- a/pkgs/applications/radio/freedv/default.nix
+++ b/pkgs/applications/radio/freedv/default.nix
@@ -45,5 +45,6 @@ stdenv.mkDerivation rec {
     description = "Digital voice for HF radio";
     license = licenses.lgpl21;
     maintainers = with maintainers; [ mvs ];
+    platforms = platforms.unix;
   };
 }