diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libstore/derivations.hh | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libstore/derivations.hh b/src/libstore/derivations.hh index b62e40786..98e59b64e 100644 --- a/src/libstore/derivations.hh +++ b/src/libstore/derivations.hh @@ -135,7 +135,10 @@ struct DerivationType : _DerivationTypeRaw { separately. Never true for non-CA derivations. */ bool needsNetworkAccess() const; - /* FIXME */ + /* Whether the derivation is expected to produce the same result + every time, and therefore it only needs to be built once. This + is only false for derivations that have the attribute '__impure + = true'. */ bool isPure() const; /* Does the derivation knows its own output paths? |