diff --git a/srcpkgs/pdftk/template b/srcpkgs/pdftk/template
index f86efeae10e..56af9ba6965 100644
--- a/srcpkgs/pdftk/template
+++ b/srcpkgs/pdftk/template
@@ -14,9 +14,11 @@ checksum=118f6a25fd3acaafb58824dce6f97cdc07e56050e666b90e4c4ef426ea37b8c1
 nocross=yes
 
 do_build() {
+	_cxxflags="${CXXFLAGS//-fstack-clash-protection}"
+	_cxxflags="${_cxxflags//-ffile-prefix-map=\/builddir\/${pkgname}-${version}\/${build_wrksrc}=.}"
 	sed -e "s;@CXX@;g++-6;" \
 		-e "s;@AR@;$AR;" \
-		-e "s;@CXXFLAGS@;${CXXFLAGS//-fstack-clash-protection};" \
+		-e "s;@CXXFLAGS@;${_cxxflags};" \
 		-e "s;@LDFLAGS@;$LDFLAGS;" \
 		${FILESDIR}/Makefile > Makefile
 	make ${makejobs} || make ${makjobs}