1 files changed, 3 insertions, 1 deletions
diff --git a/src/libstore/build/drv-output-substitution-goal.hh b/src/libstore/build/drv-output-substitution-goal.hh
index 5d1253a71..da2426e5e 100644
--- a/src/libstore/build/drv-output-substitution-goal.hh
+++ b/src/libstore/build/drv-output-substitution-goal.hh
@@ -73,7 +73,9 @@ public:
     void work() override;
     void handleEOF(int fd) override;
 
-    JobCategory jobCategory() override { return JobCategory::Substitution; };
+    JobCategory jobCategory() const override {
+        return JobCategory::Substitution;
+    };
 };
 
 }