:: commit 16abc1df91eb929c4a81abec9a0f939502960c30

diff --git a/common/GNUmakefile b/common/GNUmakefile
index 922ad85a..1088a50f 100644
--- a/common/GNUmakefile
+++ b/common/GNUmakefile
@@ -46,7 +46,7 @@ override CFLAGS_FOR_TARGET += \
     -fno-omit-frame-pointer \
     -fno-strict-aliasing \
     -fno-lto \
-    -ffile-prefix-map='$(call SHESCAPE,$(SRCDIR))'=
+    -ffile-prefix-map='$(call SHESCAPE,$(SRCDIR))'=.
 
 override CPPFLAGS_FOR_TARGET := \
     -isystem ../freestanding-headers \