1 files changed, 9 insertions, 0 deletions
diff --git a/src/libstore/realisation.hh b/src/libstore/realisation.hh
index 3922d1267..2a093c128 100644
--- a/src/libstore/realisation.hh
+++ b/src/libstore/realisation.hh
@@ -12,6 +12,7 @@
 namespace nix {
 
 class Store;
+struct OutputsSpec;
 
 /**
  * A general `Realisation` key.
@@ -93,6 +94,14 @@ typedef std::map<std::string, Realisation> SingleDrvOutputs;
  */
 typedef std::map<DrvOutput, Realisation> DrvOutputs;
 
+/**
+ * Filter a SingleDrvOutputs to include only specific output names
+ *
+ * Moves the `outputs` input.
+ */
+SingleDrvOutputs filterDrvOutputs(const OutputsSpec&, SingleDrvOutputs&&);
+
+
 struct OpaquePath {
     StorePath path;