diff --git a/Makefile.in b/Makefile.in
index 1869476165b..956bc451686 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -22,7 +22,7 @@ CFG_RUSTC_FLAGS := -nowarn
 CFG_DSYMUTIL := true
 
 ifeq ($(CFG_OSTYPE), FreeBSD)
-  LIB := lib$(1).so
+  CFG_LIB_NAME=lib$(1).so
   CFG_GCC_CFLAGS += -fPIC -march=i686 -I/usr/local/include
   CFG_GCC_LINK_FLAGS += -shared -fPIC -lpthread -lrt
   ifeq ($(CFG_CPUTYPE), x86_64)
@@ -33,7 +33,7 @@ ifeq ($(CFG_OSTYPE), FreeBSD)
 endif
 
 ifeq ($(CFG_OSTYPE), Linux)
-  LIB := lib$(1).so
+  CFG_LIB_NAME=lib$(1).so
   CFG_GCC_CFLAGS += -fPIC -march=i686
   CFG_GCC_LINK_FLAGS += -shared -fPIC -ldl -lpthread -lrt
   ifeq ($(CFG_CPUTYPE), x86_64)
@@ -44,7 +44,7 @@ ifeq ($(CFG_OSTYPE), Linux)
 endif
 
 ifeq ($(CFG_OSTYPE), Darwin)
-  LIB := lib$(1).dylib
+  CFG_LIB_NAME=lib$(1).dylib
   CFG_UNIXY := 1
   CFG_GCC_LINK_FLAGS += -dynamiclib -lpthread
   # Darwin has a very blurry notion of "64 bit", and claims it's running