diff --git a/com.oracle.truffle.r.native/Makefile b/com.oracle.truffle.r.native/Makefile
index 9c24dba8b68693ec9a4dc6fe189c32f67e9ace55..f44d911756a2f071b48981aa5f907a30fc509429 100644
--- a/com.oracle.truffle.r.native/Makefile
+++ b/com.oracle.truffle.r.native/Makefile
@@ -27,13 +27,7 @@
 
 export TOPDIR = $(CURDIR)
 export R_VERSION = 3.1.3
-
-ifndef GNUR_HOME
 export GNUR_HOME = $(TOPDIR)/gnur/R-$(R_VERSION)
-export GNUR_HOME_ORIGIN = local
-else
-export GNUR_HOME_ORIGIN = environment
-endif
 
 all: 
 	$(MAKE) -C gnur
diff --git a/com.oracle.truffle.r.native/gnur/Makefile b/com.oracle.truffle.r.native/gnur/Makefile
index 90ee209245bebe97cfbe49a041c865df5a5d30a2..8b034678383fd380c42d5859196426f51c89b857 100644
--- a/com.oracle.truffle.r.native/gnur/Makefile
+++ b/com.oracle.truffle.r.native/gnur/Makefile
@@ -27,20 +27,12 @@ all: makegnur
 	$(MAKE) -f Makefile.platform
 	$(MAKE) -f Makefile.libs
 
-ifeq  ($(GNUR_HOME_ORIGIN), environment)
-makegnur:
-else
 makegnur:
 	$(MAKE) -f Makefile.gnur
-endif
 
 clean: cleangnur
 	$(MAKE) -f Makefile.libs clean
 	$(MAKE) -f Makefile.platform clean
 
-ifeq  ($(GNUR_HOME_ORIGIN), environment)
-cleangnur:
-else
 cleangnur:
 	$(MAKE) -f Makefile.gnur clean
-endif