Remove std::set alias

src/libexpr/get-drvs.cc

@@ -266,7 +266,7 @@ void DrvInfo::setMeta(const string & name, Value * v)
 
 
 /* Cache for already considered attrsets. */
-typedef set<Bindings *> Done;
+typedef std::set<Bindings *> Done;
 
 
 /* Evaluate value `v'.  If it evaluates to a set of type `derivation',

src/libexpr/primops.cc

@@ -654,7 +654,7 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
     // `doneKeys' doesn't need to be a GC root, because its values are
     // reachable from res.
     auto cmp = CompareValues(state);
-    set<Value *, decltype(cmp)> doneKeys(cmp);
+    std::set<Value *, decltype(cmp)> doneKeys(cmp);
     while (!workSet.empty()) {
         Value * e = *(workSet.begin());
         workSet.pop_front();