--- a/config.mk
+++ b/config.mk
@@ -98,15 +98,15 @@
 PKGS += javascriptcoregtk-4.0
 
 # Check user has correct packages installed (and found by pkg-config).
-PKGS_OK := $(shell pkg-config --print-errors --exists $(PKGS) && echo 1)
+PKGS_OK := $(shell $(PKG_CONFIG) --print-errors --exists $(PKGS) && echo 1)
 ifneq ($(PKGS_OK),1)
     $(error Cannot find required package(s\) to build luakit. Please \
     check you have the above packages installed and try again)
 endif
 
 # Add pkg-config options to compile flags.
-CFLAGS  += $(shell pkg-config --cflags $(PKGS))
+CFLAGS  += $(shell $(PKG_CONFIG) --cflags $(PKGS))
 CFLAGS  += -I./
 
 # Add pkg-config options to linker flags.
-LDFLAGS += $(shell pkg-config --libs $(PKGS))
+LDFLAGS += $(shell $(PKG_CONFIG) --libs $(PKGS))