Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -22,6 +22,9 @@ else
 	ifeq ($(UNAME_S),FreeBSD)
 		TARGET_OS := freebsd
 	endif
+	ifeq ($(UNAME_S),OpenBSD)
+		TARGET_OS := openbsd
+	endif
 endif
 endif # TARGET_OS
 
@@ -48,7 +51,6 @@ endif
 
 STRIP ?= strip
 
-VERSION ?= $(shell git describe --always)
 LITTLEFS_VERSION := $(shell git -C littlefs describe --tags || echo "unknown")
 BUILD_CONFIG_NAME ?= -generic
 
@@ -75,8 +77,8 @@ override CPPFLAGS := \
 	-D LFS_NAME_MAX=32 \
 	$(CPPFLAGS)
 
-override CFLAGS := -std=gnu99 -Os -Wall $(TARGET_CFLAGS) $(CFLAGS)
-override CXXFLAGS := -std=gnu++11 -Os -Wall $(TARGET_CXXFLAGS) $(CXXFLAGS)
+override CFLAGS := -std=gnu99 -Wall $(TARGET_CFLAGS) $(CFLAGS)
+override CXXFLAGS := -std=gnu++11 -Wall $(TARGET_CXXFLAGS) $(CXXFLAGS)
 override LDFLAGS := $(TARGET_LDFLAGS) $(LDFLAGS)
 
 DIST_NAME := mklittlefs-$(VERSION)$(BUILD_CONFIG_NAME)-$(TARGET_OS)