diff --git a/pkgs/applications/window-managers/i3/default.nix b/pkgs/applications/window-managers/i3/default.nix
index 19d72559c5f..f07c1d22310 100644
--- a/pkgs/applications/window-managers/i3/default.nix
+++ b/pkgs/applications/window-managers/i3/default.nix
@@ -24,7 +24,8 @@ stdenv.mkDerivation rec {
 
   doCheck = stdenv.system == "x86_64-linux";
 
-  checkPhase = ''
+  checkPhase = stdenv.lib.optionalString (stdenv.system == "x86_64-linux")
+  ''
     ln -sf "${xdummy}/bin/xdummy" testcases/Xdummy
     (cd testcases && perl complete-run.pl -p 1)
     ! grep -q '^not ok' testcases/latest/complete-run.log