diff --git a/pkgs/development/tools/phantomjs2/default.nix b/pkgs/development/tools/phantomjs2/default.nix
index f7d22395a03..3c062dbe1ab 100644
--- a/pkgs/development/tools/phantomjs2/default.nix
+++ b/pkgs/development/tools/phantomjs2/default.nix
@@ -105,6 +105,7 @@ in stdenv.mkDerivation rec {
     $out/bin/phantomjs
   '' + ''
     wrapProgram $out/bin/phantomjs \
+    --set QT_QPA_PLATFORM offscreen \
     --prefix PATH : ${stdenv.lib.makeBinPath [ qtbase ]}
   '';