1 files changed, 4 insertions, 0 deletions
diff --git a/src/libstore/globals.hh b/src/libstore/globals.hh
index 0a1072e36999..7add7cf7c523 100644
--- a/src/libstore/globals.hh
+++ b/src/libstore/globals.hh
@@ -204,6 +204,10 @@ struct Settings {
     /* Whether the importNative primop should be enabled */
     bool enableImportNative;
 
+    /* The hook to run just before a build to set derivation-specific
+       build settings */
+    Path preBuildHook;
+
 private:
     SettingsMap settings, overrides;