1 files changed, 6 insertions, 11 deletions
diff --git a/src/libfetchers/attrs.hh b/src/libfetchers/attrs.hh
index d6e0ae000..e41037633 100644
--- a/src/libfetchers/attrs.hh
+++ b/src/libfetchers/attrs.hh
@@ -6,29 +6,24 @@
 
 #include <nlohmann/json_fwd.hpp>
 
-namespace nix::fetchers {
+#include <optional>
 
-/* Wrap bools to prevent string literals (i.e. 'char *') from being
-   cast to a bool in Attr. */
-template<typename T>
-struct Explicit {
-    T t;
-};
+namespace nix::fetchers {
 
-typedef std::variant<std::string, int64_t, Explicit<bool>> Attr;
+typedef std::variant<std::string, uint64_t, Explicit<bool>> Attr;
 typedef std::map<std::string, Attr> Attrs;
 
 Attrs jsonToAttrs(const nlohmann::json & json);
 
-nlohmann::json attrsToJson(const Attrs & attrs);
+nlohmann::json attrsToJSON(const Attrs & attrs);
 
 std::optional<std::string> maybeGetStrAttr(const Attrs & attrs, const std::string & name);
 
 std::string getStrAttr(const Attrs & attrs, const std::string & name);
 
-std::optional<int64_t> maybeGetIntAttr(const Attrs & attrs, const std::string & name);
+std::optional<uint64_t> maybeGetIntAttr(const Attrs & attrs, const std::string & name);
 
-int64_t getIntAttr(const Attrs & attrs, const std::string & name);
+uint64_t getIntAttr(const Attrs & attrs, const std::string & name);
 
 std::optional<bool> maybeGetBoolAttr(const Attrs & attrs, const std::string & name);