diff --git a/makefile b/makefile
index fc51ff4..7af36a9 100644
--- a/makefile
+++ b/makefile
@@ -1,6 +1,8 @@
 LISTNAME=easylist.txt
 PREFIX ?= /usr
-EXTENSION_DIR ?= $(PREFIX)/lib/wyebrowser
+WEBKIT ?= webkit2gtk-4.1
+APPDIR ?= wyebrowser4.1
+EXTENSION_DIR ?= $(PREFIX)/lib/$(APPDIR)
 ifeq ($(DEBUG), 1)
 	CFLAGS += -Wall
 else
@@ -13,7 +15,7 @@ all: adblock.so wyebab librun.o testrun
 
 adblock.so: ab.c ephy-uri-tester.c ephy-uri-tester.h librun.o makefile
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< librun.o -shared -fPIC \
-		`pkg-config --cflags --libs gtk+-3.0 glib-2.0 webkit2gtk-4.0` \
+		`pkg-config --cflags --libs gtk+-3.0 glib-2.0 $(WEBKIT)` \
 		$(DDEBUG) -DISEXT -DEXENAME=\"wyebab\"
 
 wyebab: ab.c ephy-uri-tester.c ephy-uri-tester.h librun.o makefile