1 files changed, 11 insertions, 0 deletions
diff --git a/src/libstore/derivations.cc b/src/libstore/derivations.cc
index f9795dbaf..0c921b64a 100644
--- a/src/libstore/derivations.cc
+++ b/src/libstore/derivations.cc
@@ -57,6 +57,17 @@ bool derivationIsFixed(DerivationType dt) {
     assert(false);
 }
 
+bool derivationHasKnownOutputPaths(DerivationType dt) {
+    switch (dt) {
+    case DerivationType::InputAddressed: return true;
+    case DerivationType::CAFixed: return true;
+    case DerivationType::CAFloating: return false;
+    case DerivationType::DeferredInputAddressed: return false;
+    };
+    assert(false);
+}
+
+
 bool derivationIsImpure(DerivationType dt) {
     switch (dt) {
     case DerivationType::InputAddressed: return false;