diff --git a/configure b/configure
index 4199980..3459f94 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,8 @@
 #!/bin/sh
 set -eu
 
+: ${PKG_CONFIG:=pkg-config}
+
 cflags() {
 	echo "CFLAGS += $*"
 }
@@ -8,16 +10,16 @@ defstr() {
 	cflags "-D'$1=\"$2\"'"
 }
 defvar() {
-	defstr "$1" "$(pkg-config --variable=$3 $2)${4:-}"
+	defstr "$1" "$(${PKG_CONFIG} --variable=$3 $2)${4:-}"
 }
 ldadd() {
 	lib=$1; shift
 	echo "LDADD.${lib} = $*"
 }
 config() {
-	pkg-config --print-errors "$@"
-	cflags $(pkg-config --cflags "$@")
-	for lib; do ldadd $lib $(pkg-config --libs $lib); done
+	${PKG_CONFIG} --print-errors "$@"
+	cflags $(${PKG_CONFIG} --cflags "$@")
+	for lib; do ldadd $lib $(${PKG_CONFIG} --libs $lib); done
 }
 
 exec >config.mk