diff --git a/linux-build-farm/build.sh b/linux-build-farm/build.sh
index f2d13154d..da95c04cc 100755
--- a/linux-build-farm/build.sh
+++ b/linux-build-farm/build.sh
@@ -41,7 +41,7 @@ for distro in $subdirs; do
 
 	rm -f *.deb *.rpm
 
-	if [ -e "`echo $distro | grep -F debian`" -a -e "`echo $distro | grep -F ubuntu`" ]; then
+	if [ ! -n "`echo $distro | grep -F debian`" -a ! -n "`echo $distro | grep -F ubuntu`" ]; then
 		docker run --rm -v `pwd`:/artifacts --privileged -it zt1-build-${distro}-x64 /bin/bash -c 'cd /ZeroTierOne ; make redhat ; cd .. ; cp `find /root/rpmbuild -type f -name *.rpm` /artifacts ; ls -l /artifacts'
 		docker run --rm -v `pwd`:/artifacts --privileged -it zt1-build-${distro}-x86 /bin/bash -c 'cd /ZeroTierOne ; make redhat ; cd .. ; cp `find /root/rpmbuild -type f -name *.rpm` /artifacts ; ls -l /artifacts'
 	else
diff --git a/make-linux.mk b/make-linux.mk
index 8bfee3a04..6273bc718 100644
--- a/make-linux.mk
+++ b/make-linux.mk
@@ -143,6 +143,7 @@ doc:	manpages
 clean: FORCE
 	rm -rf *.so *.o node/*.o controller/*.o osdep/*.o service/*.o ext/http-parser/*.o ext/lz4/*.o ext/json-parser/*.o ext/miniupnpc/*.o ext/libnatpmp/*.o $(OBJS) zerotier-one zerotier-idtool zerotier-cli zerotier-selftest build-* ZeroTierOneInstaller-* *.deb *.rpm .depend doc/*.1 doc/*.2 doc/*.8 debian/files debian/zerotier-one*.debhelper debian/zerotier-one.substvars debian/*.log debian/zerotier-one
 	find linux-build-farm -type f -name '*.deb' -print0 | xargs -0 rm -fv
+	find linux-build-farm -type f -name '*.rpm' -print0 | xargs -0 rm -fv
 
 distclean:	clean
 	rm -rf doc/node_modules