diff --git a/freestanding/Makefile b/freestanding/Makefile
index f22d220d..4bb3ac57 100644
--- a/freestanding/Makefile
+++ b/freestanding/Makefile
@@ -1,6 +1,4 @@
-PKG_CONFIG_PATH := $(shell opam config var prefix)/lib/pkgconfig
-
-EXISTS := $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) pkg-config --exists ocaml-freestanding; echo $$?)
+EXISTS := $(shell pkg-config --exists ocaml-freestanding; echo $$?)
 
 .PHONY: all clean
 all: libtcpip_freestanding_stubs.a
@@ -10,7 +8,7 @@ libtcpip_freestanding_stubs.a:
 	touch $@
 else
 CC ?= cc
-FREESTANDING_CFLAGS := $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) pkg-config --cflags ocaml-freestanding)
+FREESTANDING_CFLAGS := $(shell pkg-config --cflags ocaml-freestanding)
 CFLAGS := $(FREESTANDING_CFLAGS)
 
 OBJS=checksum_stubs.o