diff --git a/pkgs/development/libraries/libcxxrt/default.nix b/pkgs/development/libraries/libcxxrt/default.nix
index c18e699eaf869..84416d2cd5859 100644
--- a/pkgs/development/libraries/libcxxrt/default.nix
+++ b/pkgs/development/libraries/libcxxrt/default.nix
@@ -13,9 +13,11 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake ];
 
+  outputs = [ "out" "dev" ];
+
   installPhase = ''
-    mkdir -p $out/include $out/lib
-    cp ../src/cxxabi.h $out/include
+    mkdir -p $dev/include $out/lib
+    cp ../src/cxxabi.h $dev/include
     cp lib/libcxxrt${stdenv.hostPlatform.extensions.library} $out/lib
   '';