diff --git a/src/libcmd/built-path.cc b/src/libcmd/built-path.cc
index 8e2efc7c3..c5eb93c5d 100644
--- a/src/libcmd/built-path.cc
+++ b/src/libcmd/built-path.cc
@@ -12,9 +12,9 @@ namespace nix {
     bool MY_TYPE ::operator COMPARATOR (const MY_TYPE & other) const \
     { \
         const MY_TYPE* me = this; \
-        auto fields1 = std::make_tuple<const CHILD_TYPE &, const FIELD_TYPE &>(*me->drvPath, me->FIELD); \
+        auto fields1 = std::tie(*me->drvPath, me->FIELD); \
         me = &other; \
-        auto fields2 = std::make_tuple<const CHILD_TYPE &, const FIELD_TYPE &>(*me->drvPath, me->FIELD); \
+        auto fields2 = std::tie(*me->drvPath, me->FIELD); \
         return fields1 COMPARATOR fields2; \
     }
 #define CMP(CHILD_TYPE, MY_TYPE, FIELD) \
diff --git a/src/libstore/derived-path.cc b/src/libstore/derived-path.cc
index 3105dbc93..a7b404321 100644
--- a/src/libstore/derived-path.cc
+++ b/src/libstore/derived-path.cc
@@ -12,9 +12,9 @@ namespace nix {
     bool MY_TYPE ::operator COMPARATOR (const MY_TYPE & other) const \
     { \
         const MY_TYPE* me = this; \
-        auto fields1 = std::make_tuple<const CHILD_TYPE &, const FIELD_TYPE &>(*me->drvPath, me->FIELD); \
+        auto fields1 = std::tie(*me->drvPath, me->FIELD); \
         me = &other; \
-        auto fields2 = std::make_tuple<const CHILD_TYPE &, const FIELD_TYPE &>(*me->drvPath, me->FIELD); \
+        auto fields2 = std::tie(*me->drvPath, me->FIELD); \
         return fields1 COMPARATOR fields2; \
     }
 #define CMP(CHILD_TYPE, MY_TYPE, FIELD) \
@@ -22,13 +22,9 @@ namespace nix {
     CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, !=) \
     CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, <)
 
-#define FIELD_TYPE std::string
 CMP(SingleDerivedPath, SingleDerivedPathBuilt, output)
-#undef FIELD_TYPE
 
-#define FIELD_TYPE OutputsSpec
 CMP(SingleDerivedPath, DerivedPathBuilt, outputs)
-#undef FIELD_TYPE
 
 #undef CMP
 #undef CMP_ONE
diff --git a/src/libutil/comparator.hh b/src/libutil/comparator.hh
index a4d20a675..cbc2bb4fd 100644
--- a/src/libutil/comparator.hh
+++ b/src/libutil/comparator.hh
@@ -13,9 +13,9 @@
 #define GENERATE_ONE_CMP(PRE, QUAL, COMPARATOR, MY_TYPE, ...) \
     PRE bool QUAL operator COMPARATOR(const MY_TYPE & other) const { \
       __VA_OPT__(const MY_TYPE * me = this;) \
-      auto fields1 = std::make_tuple( __VA_ARGS__ ); \
+      auto fields1 = std::tie( __VA_ARGS__ ); \
       __VA_OPT__(me = &other;) \
-      auto fields2 = std::make_tuple( __VA_ARGS__ ); \
+      auto fields2 = std::tie( __VA_ARGS__ ); \
       return fields1 COMPARATOR fields2; \
     }
 #define GENERATE_EQUAL(prefix, qualification, my_type, args...) \