diff --git a/project/config/cfgdefs.sh b/project/config/cfgdefs.sh
index 4e3cf18..9f327fa 100644
--- a/project/config/cfgdefs.sh
+++ b/project/config/cfgdefs.sh
@@ -12,6 +12,7 @@
 # finally, cfgdefs.sh may update the contents of the
 # config-time generated cfgdefs.mk.
 
+mb_manifest=MANIFEST.rawball
 
 for arg ; do
 	case "$arg" in
@@ -75,7 +76,7 @@ cfgdefs_output_source_lists()
 			>> "$mb_pwd/cfgdefs.mk"
 
 	printf '\t$(SOURCE_DIR)/%s \\\n'                       \
-		$(grep '/m4/' "$mb_source_dir"/MANIFEST.RAWBALL \
+		$(grep '/m4/' "$mb_source_dir/$mb_manifest"     \
 			| grep -v -e '/acdir/' -e '/internal/'   \
 			| grep -v -e '/amversion.in'              \
 			| cut -d' ' -f3)                           \
@@ -86,9 +87,9 @@ cfgdefs_output_source_lists()
 	printf '\n\nAUTOMAKE_AM_SOURCE_FILES = \\\n' \
 			>> "$mb_pwd/cfgdefs.mk"
 
-	printf '\t$(SOURCE_DIR)/%s \\\n'                       \
-		$(grep '/am/' "$mb_source_dir"/MANIFEST.RAWBALL \
-			| cut -d' ' -f3)                          \
+	printf '\t$(SOURCE_DIR)/%s \\\n'                    \
+		$(grep '/am/' "$mb_source_dir/$mb_manifest"  \
+			| cut -d' ' -f3)                      \
 			>> "$mb_pwd/cfgdefs.mk"
 
 
@@ -97,7 +98,7 @@ cfgdefs_output_source_lists()
 			>> "$mb_pwd/cfgdefs.mk"
 
 	printf '\t$(SOURCE_DIR)/%s \\\n'                             \
-		$(grep '/Automake/' "$mb_source_dir"/MANIFEST.RAWBALL \
+		$(grep '/Automake/' "$mb_source_dir/$mb_manifest"     \
 			| cut -d' ' -f3)                               \
 			>> "$mb_pwd/cfgdefs.mk"
 
@@ -107,7 +108,7 @@ cfgdefs_output_source_lists()
 			>> "$mb_pwd/cfgdefs.mk"
 
 	printf '\t$(SOURCE_DIR)/%s \\\n'                        \
-		$(grep '/lib/' "$mb_source_dir"/MANIFEST.RAWBALL \
+		$(grep '/lib/' "$mb_source_dir/$mb_manifest"     \
 			| grep -v -e '/am/' -e '/Automake/'       \
 			| cut -d' ' -f3)                           \
 			>> "$mb_pwd/cfgdefs.mk"