diff --git a/Mk/tree.mk b/Mk/tree.mk
new file mode 100644
index 000000000..11f83e909
--- /dev/null
+++ b/Mk/tree.mk
@@ -0,0 +1,15 @@
+all:
+
+install:
+.for TREE in ${TREES}
+	@mkdir -p ${DESTDIR}${ROOT}
+	@cp -vr ${TREE} ${DESTDIR}${ROOT}
+.endfor
+
+plist:
+.for TREE in ${TREES}
+	@(cd ${TREE}; find * -type f) | \
+	    xargs -n1 printf "${ROOT}/${TREE}/%s\n"
+.endfor
+
+.PHONY: install plist
diff --git a/contrib/Makefile b/contrib/Makefile
index 0db5ba2f2..e7aa3d349 100644
--- a/contrib/Makefile
+++ b/contrib/Makefile
@@ -1,16 +1,4 @@
-all:
+ROOT=	/usr/local/share
+TREES=	openvpn mobile-broadband-provider-info
 
-install:
-	@mkdir -p ${DESTDIR}/usr/local/share
-	@cp -vr ${.CURDIR}/openvpn ${DESTDIR}/usr/local/share/
-	@cp -vr ${.CURDIR}/mobile-broadband-provider-info \
-	    ${DESTDIR}/usr/local/share/
-
-plist:
-	@(cd ${.CURDIR}/openvpn; find * -type f) | \
-	    xargs -n1 printf "/usr/local/share/openvpn/%s\n"
-	@(cd ${.CURDIR}/mobile-broadband-provider-info; find * -type f) | \
-	    xargs -n1 printf \
-	    "/usr/local/share/mobile-broadband-provider-info/%s\n"
-
-.PHONY: install plist
+.include "../Mk/tree.mk"
diff --git a/pkg/Makefile b/pkg/Makefile
index a14de366e..a111503e0 100644
--- a/pkg/Makefile
+++ b/pkg/Makefile
@@ -1,14 +1,4 @@
-all:
+ROOT=	/usr/local/etc/pkg
+TREES=	repos fingerprints
 
-install:
-	@mkdir -p ${DESTDIR}/usr/local/etc/pkg
-	@cp -vr ${.CURDIR}/repos ${DESTDIR}/usr/local/etc/pkg/
-	@cp -vr ${.CURDIR}/fingerprints ${DESTDIR}/usr/local/etc/pkg/
-
-plist:
-	@(cd ${.CURDIR}/repos; find * -type f) | \
-	    xargs -n1 printf "/usr/local/etc/pkg/repos/%s\n"
-	@(cd ${.CURDIR}/fingerprints; find * -type f) | \
-	    xargs -n1 printf "/usr/local/etc/pkg/fingerprints/%s\n"
-
-.PHONY: install plist
+.include "../Mk/tree.mk"