diff options
| -rw-r--r-- | src/libexpr/primops.cc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 8de234951..6d7622900 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -1021,7 +1021,9 @@ static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Valu for (auto path : context) { if (path.at(0) != '/') - throw EvalError(format("in 'toFile': the file '%1%' cannot refer to derivation outputs, at %2%") % name % pos); + throw EvalError(format( + "in 'toFile': the file named '%1%' must not contain a reference " + "to a derivation but contains (%2%), at %3%") % name % path % pos); refs.insert(state.store->parseStorePath(path)); } |