diff --git a/Makefile b/Makefile
index 7584fd73..561db2e6 100644
--- a/Makefile
+++ b/Makefile
@@ -2,15 +2,15 @@ include /usr/share/dpkg/pkg-info.mk
 
 PACKAGE=libjs-extjs
 
-BUILDDIR ?= ${PACKAGE}-${DEB_VERSION_UPSTREAM}
+BUILDDIR ?= $(PACKAGE)-$(DEB_VERSION_UPSTREAM)
 GITVERSION:=$(shell git rev-parse HEAD)
 
-DEB=${PACKAGE}_${DEB_VERSION_UPSTREAM_REVISION}_all.deb
-DSC=${PACKAGE}_${DEB_VERSION_UPSTREAM_REVISION}.dsc
+DEB=$(PACKAGE)_$(DEB_VERSION_UPSTREAM_REVISION)_all.deb
+DSC=$(PACKAGE)_$(DEB_VERSION_UPSTREAM_REVISION).dsc
 
 all: deb
 
-${BUILDDIR}: debian extjs
+$(BUILDDIR): debian extjs
 	rm -rf $@ $@.tmp
 	mkdir $@.tmp
 	rsync -a debian/ $@.tmp/debian
@@ -20,28 +20,28 @@ ${BUILDDIR}: debian extjs
 	mv $@.tmp $@
 
 .PHONY: deb
-deb: ${DEB}
-${DEB}: ${BUILDDIR}
-	cd ${BUILDDIR}; dpkg-buildpackage -b -us -uc
+deb: $(DEB)
+$(DEB): $(BUILDDIR)
+	cd $(BUILDDIR); dpkg-buildpackage -b -us -uc
 	lintian $@
 
 .PHONY: dsc
-dsc: ${DSC}
-${DSC}: ${BUILDDIR}
-	cd ${BUILDDIR}; tar czf ../${PACKAGE}_${DEB_VERSION_UPSTREAM}.orig.tar.gz *
-	cd ${BUILDDIR}; dpkg-buildpackage -S -us -uc -d
+dsc: $(DSC)
+$(DSC): $(BUILDDIR)
+	cd $(BUILDDIR); tar czf ../$(PACKAGE)_$(DEB_VERSION_UPSTREAM).orig.tar.gz *
+	cd $(BUILDDIR); dpkg-buildpackage -S -us -uc -d
 	lintian $@
 
 .PHONY: upload
-upload: ${DEB}
-	tar cf - ${DEB} | ssh repoman@repo.proxmox.com -- upload --product pve,pmg,pbs --dist bookworm
+upload: $(DEB)
+	tar cf - $(DEB) | ssh repoman@repo.proxmox.com -- upload --product pve,pmg,pbs --dist bookworm
 
 .PHONY: distclean clean
 distclean: clean
 clean:
-	rm -rf ${PACKAGE}-*/ *.deb *.changes *.buildinfo *.orig.tar.* *.dsc *.debian.tar.*
-	find . -name '*~' -exec rm {} ';'
+	rm -rf $(PACKAGE)-[0-9]*/ *.deb *.changes *.buildinfo *.build *.tar.?z *.dsc
+	find . -name '*~' -exec rm () ';'
 
 .PHONY: dinstall
-dinstall: ${DEB}
-	dpkg -i ${DEB}
+dinstall: $(DEB)
+	dpkg -i $(DEB)