--- a/mkspecs/features/functions.prf
+++ b/mkspecs/features/functions.prf
@@ -100,6 +100,7 @@ defineReplace(gnPdfArgs) {
 
 defineReplace(gnArch) {
     qtArch = $$1
+    contains(qtArch, "power64"): return(ppc64)
     contains(qtArch, "i386"): return(x86)
     contains(qtArch, "x86_64"): return(x64)
     contains(qtArch, "arm"): return(arm)
--- a/configure.pri
+++ b/configure.pri
@@ -140,6 +140,7 @@ defineTest(qtConfTest_detectPlatform) {
 }
 
 defineTest(qtConfTest_detectArch) {
+    contains(QT_ARCH, "power64"): return(true)
     contains(QT_ARCH, "i386")|contains(QT_ARCH, "x86_64"): return(true)
     contains(QT_ARCH, "arm")|contains(QT_ARCH, "arm64"): return(true)
     contains(QT_ARCH, "mips"): return(true)
--- a/src/buildtools/config/linux.pri
+++ b/src/buildtools/config/linux.pri
@@ -14,6 +14,7 @@ gn_args += \
     linux_use_bundled_binutils=false \
     use_udev=true \
     use_bundled_fontconfig=false \
+    use_jumbo_build=false \
     use_sysroot=false \
     enable_session_service=false \
     is_cfi=false \