1 files changed, 7 insertions, 2 deletions
diff --git a/buildfile b/buildfile
index a4f0c31..0204de3 100644
--- a/buildfile
+++ b/buildfile
@@ -6,8 +6,13 @@
     doc{LICENSE NEWS README INSTALL* version} \
     file{manifest}
 
-doc{version}: file{manifest} # Generated by the version module.
-doc{version}: dist = true
+# The version file is auto-generated (by the version module) from manifest.
+# Include it in distribution and don't remove when cleaning in src (so that
+# clean results in a state identical to distributed).
+#
+doc{version}: file{manifest}
+doc{version}: dist  = true
+doc{version}: clean = ($src_root != $out_root)
 
 # Don't install tests or the INSTALL* files.
 #