diff --git a/pkgs/development/compilers/emscripten-fastcomp/default.nix b/pkgs/development/compilers/emscripten-fastcomp/default.nix
index bb820f9820d..330fa2a7939 100644
--- a/pkgs/development/compilers/emscripten-fastcomp/default.nix
+++ b/pkgs/development/compilers/emscripten-fastcomp/default.nix
@@ -36,6 +36,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     homepage = https://github.com/kripken/emscripten-fastcomp;
     description = "emscripten llvm";
+    platforms = platforms.all;
     maintainers = with maintainers; [ bosu ];
     license = stdenv.lib.licenses.ncsa;
   };
diff --git a/pkgs/development/compilers/emscripten/default.nix b/pkgs/development/compilers/emscripten/default.nix
index daa2ea3113c..0264c9d36d9 100644
--- a/pkgs/development/compilers/emscripten/default.nix
+++ b/pkgs/development/compilers/emscripten/default.nix
@@ -37,6 +37,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     homepage = https://github.com/kripken/emscripten;
     description = "An LLVM-to-JavaScript Compiler";
+    platforms = platforms.all;
     maintainers = with maintainers; [ bosu ];
     license = licenses.ncsa;
   };