--- lz4-1.8.2.orig/lib/Makefile	2018-05-07 23:38:45.000000000 +0200
+++ lz4-1.8.2/lib/Makefile	2018-05-22 20:22:31.000000000 +0200
@@ -45,6 +45,7 @@ LIBVER  := $(shell echo $(LIBVER_SCRIPT)
 BUILD_SHARED:=yes
 BUILD_STATIC:=yes
 
+OS?=$(shell uname)
 CPPFLAGS+= -DXXH_NAMESPACE=LZ4_
 CFLAGS  ?= -O3
 DEBUGFLAGS:= -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow \
@@ -58,7 +59,7 @@ SRCFILES := $(sort $(wildcard *.c))
 
 # OS X linker doesn't support -soname, and use different extension
 # see : https://developer.apple.com/library/mac/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/DynamicLibraryDesignGuidelines.html
-ifeq ($(shell uname), Darwin)
+ifeq ($(OS), Darwin)
 	SHARED_EXT = dylib
 	SHARED_EXT_MAJOR = $(LIBVER_MAJOR).$(SHARED_EXT)
 	SHARED_EXT_VER = $(LIBVER).$(SHARED_EXT)