diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 2cd115dfa0..776097315c 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -92,9 +92,9 @@ SDK_CC_ARCH = "${BUILD_CC_ARCH}"
 
 BASE_PACKAGE_ARCH = "${HOST_ARCH}"
 PACKAGE_ARCH = "${BASE_PACKAGE_ARCH}"
-MACHINE_ARCH = "${@[bb.data.getVar('BASE_PACKAGE_ARCH', d, 1), bb.data.getVar('MACHINE', d, 1)][bool(bb.data.getVar('MACHINE', d, 1))]}"
-MACHINE_ARCH_qemux86-64 = "qemux86_64"
-PACKAGE_ARCHS = "all any noarch ${TARGET_ARCH} ${PACKAGE_EXTRA_ARCHS} ${MACHINE_ARCH}"
+MACHINE_ARCH = "${@[bb.data.getVar('BASE_PACKAGE_ARCH', d, 1), bb.data.getVar('MACHINE', d, 1)][bool(bb.data.getVar('MACHINE', d, 1))].replace('-', '_')}"
+PACKAGE_EXTRA_ARCHS ??= "${TARGET_ARCH}"
+PACKAGE_ARCHS = "all any noarch ${PACKAGE_EXTRA_ARCHS} ${MACHINE_ARCH}"
 # MACHINE shouldn't be included here as a variable dependency since machine specific 
 # packages are handled using multimachine
 PACKAGE_ARCHS[vardepsexclude] = "MACHINE"