From 3b77f134515866f28cc7b7ddb06274fccc5766f9 Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Sat, 13 Jul 2024 01:16:33 +0200
Subject: [PATCH] dropEmptyInitThenConcatStringsSep -> concatStringSep:
 experimental features do not render as empty strings

---
 src/libutil/config.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libutil/config.cc b/src/libutil/config.cc
index 81ec9a4c3..25bfe462f 100644
--- a/src/libutil/config.cc
+++ b/src/libutil/config.cc
@@ -9,6 +9,8 @@
 
 #include <nlohmann/json.hpp>
 
+#include "strings.hh"
+
 namespace nix {
 
 Config::Config(StringMap initials)
@@ -362,7 +364,7 @@ template<> std::string BaseSetting<std::set<ExperimentalFeature>>::to_string() c
     StringSet stringifiedXpFeatures;
     for (const auto & feature : value)
         stringifiedXpFeatures.insert(std::string(showExperimentalFeature(feature)));
-    return dropEmptyInitThenConcatStringsSep(" ", stringifiedXpFeatures);
+    return concatStringsSep(" ", stringifiedXpFeatures);
 }
 
 template<> StringMap BaseSetting<StringMap>::parse(const std::string & str) const