diff --git a/pkgs/applications/audio/faust/faust2.nix b/pkgs/applications/audio/faust/faust2.nix
index 9bf4d3a5704..515f8a6f9af 100644
--- a/pkgs/applications/audio/faust/faust2.nix
+++ b/pkgs/applications/audio/faust/faust2.nix
@@ -5,8 +5,7 @@
 , pkgconfig
 , cmake
 , llvm
-# TODO: put back when it builds again
-# , emscripten
+, emscripten
 , openssl
 , libsndfile
 , libmicrohttpd
@@ -47,7 +46,7 @@ let
     inherit src;
 
     nativeBuildInputs = [ makeWrapper pkgconfig cmake vim which ];
-    buildInputs = [ llvm /*emscripten*/ openssl libsndfile libmicrohttpd gnutls libtasn1 p11-kit ];
+    buildInputs = [ llvm emscripten openssl libsndfile libmicrohttpd gnutls libtasn1 p11-kit ];
 
 
     passthru = {