Don't clean generated version

1 files changed, 7 insertions, 2 deletions

diff --git a/buildfile b/buildfile
index 2ed54a0..54a7828 100644
--- a/buildfile
+++ b/buildfile
@@ -18,8 +18,13 @@ BOOTSTRAP-WINDOWS
 
 ./: $d doc{$i README version} cli{$i} file{build.sh build-*} 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 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 the BOOTSTRAP/INSTALL files. But UPGRADE could be useful.
 #