Index: boot/Makefile.build
===================================================================
--- boot/Makefile.build	(revision 0798689015f6ea90e886a343e0eb42cff7ca5c2a)
+++ boot/Makefile.build	(revision d088616132094127a4b2c38739dbbeb63290a63b)
@@ -46,5 +46,6 @@
 COMMON_CFLAGS = $(INCLUDES) -O$(OPTIMIZATION) -imacros $(CONFIG_HEADER) \
 	-ffreestanding -fno-builtin -nostdlib -nostdinc \
-	-fexec-charset=UTF-8 -finput-charset=UTF-8 -fno-common
+	-fexec-charset=UTF-8 -finput-charset=UTF-8 -fno-common \
+	-fdebug-prefix-map=$(realpath $(ROOT_PATH))=.
 
 GCC_CFLAGS = -Wall -Wextra -Wno-unused-parameter -Wmissing-prototypes \