--- a/ui/qt/qt.gni
+++ b/ui/qt/qt.gni
@@ -12,9 +12,21 @@ declare_args() {
   use_qt = is_linux && !is_castos && !is_msan
 }
 
+declare_args() {
+  if(!use_sysroot && use_qt) {
+     moc_qt5_path = ""
+  }
+}
+
 declare_args() {
   use_qt6 = use_qt && use_sysroot
 }
 
+declare_args() {
+  if(!use_sysroot && use_qt6) {
+     moc_qt6_path = ""
+  }
+}
+
 # use_qt6 => use_qt
 assert(!use_qt6 || use_qt)
--- a/ui/qt/BUILD.gn
+++ b/ui/qt/BUILD.gn
@@ -41,16 +41,19 @@ source_set("qt_interface") {
   sources = [ "qt_interface.cc" ]
 }
 
-if (!use_sysroot) {
-  action("generate_moc") {
-    script = "moc_wrapper.py"
-    inputs = [ "//ui/qt/qt_shim.h" ]
-    outputs = [ "$root_gen_dir/qt_shim_moc.cc" ]
-    args = rebase_path(inputs + outputs, root_build_dir)
+template("qt_shim") {
+  if (!use_sysroot) {
+    action("generate_moc" + invoker.qt_version) {
+      script = "moc_wrapper.py"
+      inputs = [ "//ui/qt/qt_shim.h" ]
+      outputs = [ "$root_gen_dir/qt" + invoker.qt_version + "/qt_shim_moc.cc" ]
+      args = rebase_path(inputs + outputs, root_build_dir)
+      if (invoker.moc_qt_path != "") {
+        args += [ "--path", invoker.moc_qt_path ]
+      }
+    }
   }
-}
 
-template("qt_shim") {
   pkg_config("qt" + invoker.qt_version + "_config") {
     packages = [
       "Qt" + invoker.qt_version + "Core",
@@ -90,17 +93,23 @@ template("qt_shim") {
       # avoid a build-time dependency on `moc` when using the sysroot.
       sources += [ "qt" + invoker.qt_version + "_shim_moc.cc" ]
     } else {
-      sources += get_target_outputs(":generate_moc")
-      deps += [ ":generate_moc" ]
+      sources += get_target_outputs(":generate_moc" + invoker.qt_version)
+      deps += [ ":generate_moc" + invoker.qt_version ]
     }
   }
 }
 qt_shim("qt5_shim") {
   qt_version = "5"
+  if (!use_sysroot) {
+    moc_qt_path = "$moc_qt5_path"
+  }
 }
 if (use_qt6) {
   qt_shim("qt6_shim") {
     qt_version = "6"
+  if (!use_sysroot) {
+    moc_qt_path = "$moc_qt6_path"
+  }
   }
 }
 
--- a/ui/qt/moc_wrapper.py
+++ b/ui/qt/moc_wrapper.py
@@ -3,8 +3,21 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import argparse
 import subprocess
-import sys
 
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    'input', type=str, help='Input header file.')
+parser.add_argument(
+    'output', type=str, help='Output file.')
+parser.add_argument(
+    '--path', required=False, type=str, default=None,
+    help='Path to moc binary.')
 
-subprocess.check_call(["moc", sys.argv[1], "-o", sys.argv[2]])
+args = parser.parse_args()
+
+if args.path is None:
+    subprocess.check_call(["moc", args.input, "-o", args.output])
+else:
+    subprocess.check_call([args.path + "/moc", args.input, "-o", args.output])