diff --git a/pkgs/desktops/lxqt/lxqt-config/default.nix b/pkgs/desktops/lxqt/lxqt-config/default.nix
index 5913ec7a0d03..60e6ca3d4e82 100644
--- a/pkgs/desktops/lxqt/lxqt-config/default.nix
+++ b/pkgs/desktops/lxqt/lxqt-config/default.nix
@@ -51,10 +51,6 @@ mkDerivation rec {
     xorg.xf86inputlibinput.dev
   ];
 
-  postPatch = ''
-    sed -i "/\''${XORG_LIBINPUT_INCLUDE_DIRS}/a ${xorg.xf86inputlibinput.dev}/include/xorg" lxqt-config-input/CMakeLists.txt
-  '';
-
   passthru.updateScript = lxqtUpdateScript { inherit pname version src; };
 
   meta = with lib; {
diff --git a/pkgs/desktops/plasma-5/plasma-desktop/default.nix b/pkgs/desktops/plasma-5/plasma-desktop/default.nix
index d8ca0ddfdec3..37134f240dc3 100644
--- a/pkgs/desktops/plasma-5/plasma-desktop/default.nix
+++ b/pkgs/desktops/plasma-5/plasma-desktop/default.nix
@@ -40,14 +40,8 @@ mkDerivation {
     sed '1i#include <cmath>' -i kcms/touchpad/backends/x11/synapticstouchpad.cpp
   '';
   CXXFLAGS = [
-    "-I${lib.getDev xorgserver}/include/xorg"
-    "-I${lib.getDev xf86inputsynaptics}/include/xorg"
     ''-DNIXPKGS_HWCLOCK=\"${lib.getBin util-linux}/sbin/hwclock\"''
   ];
-  cmakeFlags = [
-    "-DEvdev_INCLUDE_DIRS=${lib.getDev xf86inputevdev}/include/xorg"
-    "-DXORGLIBINPUT_INCLUDE_DIRS=${lib.getDev xf86inputlibinput}/include/xorg"
-  ];
   postInstall = ''
     # Display ~/Desktop contents on the desktop by default.
     sed -i "''${!outputBin}/share/plasma/shells/org.kde.plasma.desktop/contents/defaults" \
diff --git a/pkgs/servers/x11/xorg/overrides.nix b/pkgs/servers/x11/xorg/overrides.nix
index ec43ae9d59d4..9932e46839a9 100644
--- a/pkgs/servers/x11/xorg/overrides.nix
+++ b/pkgs/servers/x11/xorg/overrides.nix
@@ -367,35 +367,35 @@ self: super:
   xf86inputevdev = super.xf86inputevdev.overrideAttrs (attrs: {
     outputs = [ "out" "dev" ]; # to get rid of xorgserver.dev; man is tiny
     preBuild = "sed -e '/motion_history_proc/d; /history_size/d;' -i src/*.c";
-    installFlags = [
-      "sdkdir=${placeholder "out"}/include/xorg"
+    configureFlags = [
+      "--with-sdkdir=${placeholder "dev"}/include/xorg"
     ];
   });
 
   xf86inputmouse = super.xf86inputmouse.overrideAttrs (attrs: {
-    installFlags = [
-      "sdkdir=${placeholder "out"}/include/xorg"
+    configureFlags = [
+      "--with-sdkdir=${placeholder "out"}/include/xorg"
     ];
   });
 
   xf86inputjoystick = super.xf86inputjoystick.overrideAttrs (attrs: {
-    installFlags = [
-      "sdkdir=${placeholder "out"}/include/xorg"
+    configureFlags = [
+      "--with-sdkdir=${placeholder "out"}/include/xorg"
     ];
   });
 
   xf86inputlibinput = super.xf86inputlibinput.overrideAttrs (attrs: {
     outputs = [ "out" "dev" ];
-    installFlags = [
-      "sdkdir=${placeholder "dev"}/include/xorg"
+    configureFlags = [
+      "--with-sdkdir=${placeholder "dev"}/include/xorg"
     ];
   });
 
   xf86inputsynaptics = super.xf86inputsynaptics.overrideAttrs (attrs: {
     outputs = [ "out" "dev" ]; # *.pc pulls xorgserver.dev
-    installFlags = [
-      "sdkdir=${placeholder "out"}/include/xorg"
-      "configdir=${placeholder "out"}/share/X11/xorg.conf.d"
+    configureFlags = [
+      "--with-sdkdir=${placeholder "dev"}/include/xorg"
+      "--with-xorg-conf-dir=${placeholder "out"}/share/X11/xorg.conf.d"
     ];
   });