diff --git a/Makefile b/Makefile
index 703edff..87b4c91 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,7 @@
 
+# fix broken ubuntu
+SHELL    := bash
+
 TARGET   := anaglym
 COBJS    := $(patsubst %.c,%.o,$(wildcard *.c))
 CXXOBJS  := $(patsubst %.cc,%.o,$(wildcard *.cc))
@@ -8,11 +11,11 @@ CXXDEPS  := $(CXXOBJS:.o=.dep)
 DEPS     := $(CDEPS) $(CXXDEPS)
 
 LUAINCLUDE := $(shell which lua-config >/dev/null 2>&1; if [[ $$? == 0 ]]; then lua-config --include; fi)
-ifeq ($(LUA_INCLUDE),)
-LUA_INCLUDE := -I/usr/include/lua5.1
+ifeq ($(strip $(LUA_INCLUDE)),)
+LUAINCLUDE := -I/usr/include/lua5.1
 endif
 LUALIBS  := $(shell which lua-config >/dev/null 2>&1; if [[ $$? == 0 ]]; then lua-config --libs; fi)
-ifeq ($(LUALIBS),)
+ifeq ($(strip $(LUALIBS)),)
 LUALIBS  := -llua5.1
 endif