diff --git a/meta/classes/package_rpm.bbclass b/meta/classes/package_rpm.bbclass
index 60127d2..4647116 100644
--- a/meta/classes/package_rpm.bbclass
+++ b/meta/classes/package_rpm.bbclass
@@ -777,10 +777,16 @@ python do_package_rpm () {
 	cmd = cmd + " --define 'debug_package %{nil}'"
 	cmd = cmd + " -bb " + outspecfile
 
-	# Build the spec file!
+	# Take a shared lock, we can write multiple packages at the same time...
+	# but we need to stop the rootfs/solver from running while we do...
+	lf = bb.utils.lockfile(bb.data.expand("${DEPLOY_DIR_RPM}/rpm.lock", d), True)
+
+	# Build the rpm package!
 	bb.data.setVar('BUILDSPEC', cmd + "\n", d)
 	bb.data.setVarFlag('BUILDSPEC', 'func', '1', d)
 	bb.build.exec_func('BUILDSPEC', d)
+
+	bb.utils.unlockfile(lf)
 }
 
 python () {