diff --git a/netboot/Makefile.pxelinux.0 b/netboot/Makefile.pxelinux.0
index 093e0cfd..41296cbf 100644
--- a/netboot/Makefile.pxelinux.0
+++ b/netboot/Makefile.pxelinux.0
@@ -33,8 +33,8 @@ pxelinux.initramfs: $(BBINSTALL)
 $(BUSYBOX)/_install:
 	wget https://busybox.net/downloads/$(BUSYBOX).tar.bz2
 	tar xjf $(BUSYBOX).tar.bz2
-	make -C $(BUSYBOX) defconfig
-	make -C $(BUSYBOX) install
+	$(MAKE) -C $(BUSYBOX) defconfig
+	$(MAKE) -C $(BUSYBOX) install
 
 install:
 
diff --git a/zipl/src/Makefile b/zipl/src/Makefile
index 191c7db8..be3c1ef1 100644
--- a/zipl/src/Makefile
+++ b/zipl/src/Makefile
@@ -45,10 +45,10 @@ clean:
 .boot.o.d boot.o: ../boot/data.h
 
 ../boot/data.h:
-	make -C ../boot data.h
+	$(MAKE) -C ../boot data.h
 
 ../boot/data.o:
-	make -C ../boot data.o
+	$(MAKE) -C ../boot data.o
 
 ../boot/stage3.bin:
-	make -C ../boot stage3.bin
+	$(MAKE) -C ../boot stage3.bin