diff --git a/pkgs/development/tools/build-managers/rebar3/default.nix b/pkgs/development/tools/build-managers/rebar3/default.nix
index d9e260a13de3..e96852602fc7 100644
--- a/pkgs/development/tools/build-managers/rebar3/default.nix
+++ b/pkgs/development/tools/build-managers/rebar3/default.nix
@@ -122,5 +122,6 @@ stdenv.mkDerivation {
 
     platforms = stdenv.lib.platforms.unix;
     maintainers = with stdenv.lib.maintainers; [ gleber tazjin ];
+    license = stdenv.lib.licenses.asl20;
   };
 }