diff --git a/libs/libc/Makefile b/libs/libc/Makefile
index 17d628b4691..f98669fa9c0 100644
--- a/libs/libc/Makefile
+++ b/libs/libc/Makefile
@@ -127,18 +127,18 @@ all: $(BIN)
 .PHONY: clean distclean
 
 $(AOBJS): $(BINDIR)$(DELIM)$(DELIM)%$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
+	$(call ASSEMBLE, $(realpath $<), $@)
 
 # REVISIT: Backslash causes problems in $(COBJS) target
 
 $(COBJS): $(BINDIR)$(DELIM)$(DELIM)%$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
+	$(call COMPILE, $(realpath $<), $@)
 
 # C library for the flat build and
 # the user phase of the two-pass kernel build
 
 $(BIN): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
+	$(call ARCHIVE, $@, $(realpath $(OBJS)))
 ifeq ($(CONFIG_LIBC_ZONEINFO_ROMFS),y)
 	$(Q) $(MAKE) -C zoneinfo all BIN=$(BIN)
 endif
diff --git a/mm/Makefile b/mm/Makefile
index 5234948cd72..f9ddf0732ae 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -52,18 +52,18 @@ all: $(BIN)
 .PHONY: context depend clean distclean
 
 $(AOBJS): $(BINDIR)$(DELIM)$(DELIM)%$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
+	$(call ASSEMBLE, $(realpath $<), $@)
 
 # REVISIT: Backslash causes problems in $(COBJS) target
 
 $(COBJS): $(BINDIR)$(DELIM)$(DELIM)%$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
+	$(call COMPILE, $(realpath $<), $@)
 
 # Memory manager for the flat build and
 # the user phase of the two-pass kernel build
 
 $(BIN):	$(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
+	$(call ARCHIVE, $@, $(realpath $(OBJS)))
 
 # Memory manager for the kernel phase of the two-pass kernel build