--- source/data/Makefile.in
+++ source-uclibcng/data/Makefile.in
@@ -9,7 +9,7 @@ srcdir = @srcdir@
 top_srcdir = @top_srcdir@
 
 # So that you have $(top_builddir)/config.status
-top_builddir = ..
+top_builddir = $(realpath ..)
 
 ## All the flags and other definitions are included here.
 include $(top_builddir)/icudefs.mk