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-rw-r--r--src/libstore/binary-cache-store.hh6
1 files changed, 2 insertions, 4 deletions
diff --git a/src/libstore/binary-cache-store.hh b/src/libstore/binary-cache-store.hh
index e20b968442b7..fcde666beec6 100644
--- a/src/libstore/binary-cache-store.hh
+++ b/src/libstore/binary-cache-store.hh
@@ -41,8 +41,7 @@ public:
     /* Return the contents of the specified file, or null if it
        doesn't exist. */
     virtual void getFile(const std::string & path,
-        std::function<void(std::shared_ptr<std::string>)> success,
-        std::function<void(std::exception_ptr exc)> failure) = 0;
+        Callback<std::shared_ptr<std::string>> callback) = 0;
 
     std::shared_ptr<std::string> getFile(const std::string & path);
 
@@ -71,8 +70,7 @@ public:
     { unsupported(); }
 
     void queryPathInfoUncached(const Path & path,
-        std::function<void(std::shared_ptr<ValidPathInfo>)> success,
-        std::function<void(std::exception_ptr exc)> failure) override;
+        Callback<std::shared_ptr<ValidPathInfo>> callback) override;
 
     void queryReferrers(const Path & path,
         PathSet & referrers) override