diff --git a/druntime/posix.mak b/druntime/posix.mak
index 2766e07..7ebb0f0 100644
--- a/druntime/posix.mak
+++ b/druntime/posix.mak
@@ -323,7 +323,7 @@ benchmark-compile-only: $(ROOT)/benchmark $(DMD)
 	DMD=$(DMD) $< --repeat=0 --dflags="$(PHOBOS_DFLAGS) -de"
 
 #################### test for undesired white spaces ##########################
-MANIFEST = $(shell git ls-tree --name-only -r HEAD)
+MANIFEST = $(shell find * -type f)
 
 CWS_MAKEFILES = $(filter mak/% %.mak %/Makefile,$(MANIFEST))
 NOT_MAKEFILES = $(filter-out $(CWS_MAKEFILES) src/rt/minit.obj test/%.exp,$(MANIFEST))