diff --git a/tools/srcdiff b/tools/srcdiff
index 5ec76ad6..4ad70bf1 100755
--- a/tools/srcdiff
+++ b/tools/srcdiff
@@ -78,6 +78,9 @@ foreach (@pkglist) {
 	print "\n=== Checking $_ package ===\n";
 	straightdiff 'buildrules', "cmd/$first/include", "cmd/$_/include";
 	straightdiff 'buildmacros', "cmd/$first/include", "cmd/$_/include";
+	straightdiff 'Makefile', "cmd/$first/build", "cmd/$_/build";
+	straightdiff 'Makefile', "cmd/$first/build/rpm", "cmd/$_/build/rpm";
+	straightdiff 'Makefile', "cmd/$first/build/tar", "cmd/$_/build/tar";
 }
 print "\n=== Checking headers ===\n";
 foreach (@difflist) {