libstore: make LocalDerivationGoal::needsHashRewrite virtual

This rather simple function existed just to check some flags,
but the response varies by platform. This is a perfect case for
our subclasses.

Change-Id: Ieb1732a8d024019236e0d0028ad843a24ec3dc59

1 files changed, 7 insertions, 0 deletions

diff --git a/src/libstore/platform/darwin.hh b/src/libstore/platform/darwin.hh
index 70e8a8587..111d50d87 100644
--- a/src/libstore/platform/darwin.hh
+++ b/src/libstore/platform/darwin.hh
@@ -52,6 +52,13 @@ private:
      * Set process flags to enter or leave rosetta, then execute the builder
      */
     void execBuilder(std::string builder, Strings args, Strings envStrs) override;
+
+    /**
+     * Whether we need to rewrite output hashes.
+     * Always true on Darwin since Darwin requires hash rewriting
+     * even when sandboxing is enabled.
+     */
+    bool needsHashRewrite() override { return true; };
 };
 
 }