diff --git a/pkgs/desktops/deepin/dtkcore/default.nix b/pkgs/desktops/deepin/dtkcore/default.nix
index 561e951f34d..1dfb627c605 100644
--- a/pkgs/desktops/deepin/dtkcore/default.nix
+++ b/pkgs/desktops/deepin/dtkcore/default.nix
@@ -23,11 +23,16 @@ stdenv.mkDerivation rec {
   ];
 
   postPatch = ''
-    sed -i src/src.pro src/dtk_module.prf \
-      -e "s,\$\''${QT_HOST_DATA}/mkspecs,$out/mkspecs,"
+    # Only define QT_HOST_DATA if it is empty
+    sed '/QT_HOST_DATA=/a }' -i src/dtk_module.prf
+    sed '/QT_HOST_DATA=/i isEmpty(QT_HOST_DATA) {' -i src/dtk_module.prf
 
-    sed -i tools/script/dtk-translate.py \
-      -e "s,#!env,#!/usr/bin/env,"
+    # Fix shebang
+    sed -i tools/script/dtk-translate.py -e "s,#!env,#!/usr/bin/env,"
+  '';
+
+  preConfigure = ''
+    qmakeFlags="$qmakeFlags QT_HOST_DATA=$out"
   '';
 
   postFixup = ''
@@ -35,6 +40,8 @@ stdenv.mkDerivation rec {
     wrapPythonProgramsIn "$out/lib/dtk2" "$out $pythonPath"
   '';
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "Deepin tool kit core modules";
     homepage = https://github.com/linuxdeepin/dtkcore;