qView: fix failed build when x11Support is false

+2
+2
pkgs/applications/graphics/qview/default.nix
··· 21 hash = "sha256-h1K1Smfy875NoHtgUrOvZZp0IgcQdbyuQhXU9ndM4bA="; 22 }; 23 24 nativeBuildInputs = [ qmake ]; 25 26 buildInputs = [
··· 21 hash = "sha256-h1K1Smfy875NoHtgUrOvZZp0IgcQdbyuQhXU9ndM4bA="; 22 }; 23 24 + qmakeFlags = lib.optionals (!x11Support) [ "CONFIG+=NO_X11" ]; 25 + 26 nativeBuildInputs = [ qmake ]; 27 28 buildInputs = [