diff --git a/Makefile b/Makefile
index 555b770..01025b9 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,7 @@ WITH_VIRTUAL_INPUT = YES
 OS != uname
 VERSION ?= "CURRENT"
 PREFIX ?= /usr/local
+PKG_CONFIG ?= pkg-config
 ETC_PREFIX ?= ${PREFIX}
 
 OBJS = \
@@ -78,7 +79,7 @@ OBJS += \
 	xwayland_view.o
 .endif
 
-WAYLAND_PROTOCOLS != pkg-config --variable pkgdatadir wayland-protocols
+WAYLAND_PROTOCOLS != ${PKG_CONFIG} --variable pkgdatadir wayland-protocols
 
 .PHONY: distclean clean clean-doc doc dist install uninstall
 .PATH: src
@@ -125,31 +126,31 @@ CFLAGS += -DHAVE_VIRTUAL_INPUT=1
 
 CFLAGS += -Wall -I. -Iinclude -DHIKARI_ETC_PREFIX=${ETC_PREFIX}
 
-WLROOTS_CFLAGS != pkg-config --cflags wlroots
-WLROOTS_LIBS != pkg-config --libs wlroots
+WLROOTS_CFLAGS != ${PKG_CONFIG} --cflags wlroots
+WLROOTS_LIBS != ${PKG_CONFIG} --libs wlroots
 
 WLROOTS_CFLAGS += -DWLR_USE_UNSTABLE=1
 
-PANGO_CFLAGS != pkg-config --cflags pangocairo
-PANGO_LIBS != pkg-config --libs pangocairo
+PANGO_CFLAGS != ${PKG_CONFIG} --cflags pangocairo
+PANGO_LIBS != ${PKG_CONFIG} --libs pangocairo
 
-CAIRO_CFLAGS != pkg-config --cflags cairo
-CAIRO_LIBS != pkg-config --libs cairo
+CAIRO_CFLAGS != ${PKG_CONFIG} --cflags cairo
+CAIRO_LIBS != ${PKG_CONFIG} --libs cairo
 
-PIXMAN_CFLAGS != pkg-config --cflags pixman-1
-PIXMAN_LIBS != pkg-config --libs pixman-1
+PIXMAN_CFLAGS != ${PKG_CONFIG} --cflags pixman-1
+PIXMAN_LIBS != ${PKG_CONFIG} --libs pixman-1
 
-XKBCOMMON_CFLAGS != pkg-config --cflags xkbcommon
-XKBCOMMON_LIBS != pkg-config --libs xkbcommon
+XKBCOMMON_CFLAGS != ${PKG_CONFIG} --cflags xkbcommon
+XKBCOMMON_LIBS != ${PKG_CONFIG} --libs xkbcommon
 
-WAYLAND_CFLAGS != pkg-config --cflags wayland-server
-WAYLAND_LIBS != pkg-config --libs wayland-server
+WAYLAND_CFLAGS != ${PKG_CONFIG} --cflags wayland-server
+WAYLAND_LIBS != ${PKG_CONFIG} --libs wayland-server
 
-LIBINPUT_CFLAGS != pkg-config --cflags libinput
-LIBINPUT_LIBS != pkg-config --libs libinput
+LIBINPUT_CFLAGS != ${PKG_CONFIG} --cflags libinput
+LIBINPUT_LIBS != ${PKG_CONFIG} --libs libinput
 
-UCL_CFLAGS != pkg-config --cflags libucl
-UCL_LIBS != pkg-config --libs libucl
+UCL_CFLAGS != ${PKG_CONFIG} --cflags libucl
+UCL_LIBS != ${PKG_CONFIG} --libs libucl
 
 CFLAGS += \
 	${WLROOTS_CFLAGS} \
@@ -192,7 +193,7 @@ wlr-layer-shell-unstable-v1-protocol.h:
 	wayland-scanner server-header protocol/wlr-layer-shell-unstable-v1.xml ${.TARGET}
 
 hikari-unlocker: hikari_unlocker.c
-	${CC} ${CFLAGS_EXTRA} ${LDFLAGS_EXTRA} -o hikari-unlocker hikari_unlocker.c -lpam
+	${CC} ${LDFLAGS} ${CFLAGS} ${INCLUDES} -o hikari-unlocker hikari_unlocker.c -lpam
 
 clean-doc:
 	@test -e _darcs && echo "cleaning manpage" ||: