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-rw-r--r--src/libcmd/command.hh2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libcmd/command.hh b/src/libcmd/command.hh
index f3625ed0d..c7af8bb7c 100644
--- a/src/libcmd/command.hh
+++ b/src/libcmd/command.hh
@@ -108,6 +108,8 @@ enum class Realise {
exists. */
Derivation,
/* Evaluate in dry-run mode. Postcondition: nothing. */
+ // FIXME: currently unused, but could be revived if we can
+ // evaluate derivations in-memory.
Nothing
};