From 11a366f4694d19664328e09340ca55a029afd9b8 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Thu, 26 Apr 2018 00:44:42 +0200
Subject: [PATCH] only mutable ranges are iterable

---
 ostd/build/make.hh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ostd/build/make.hh b/ostd/build/make.hh
index f17990a..37360e8 100644
--- a/ostd/build/make.hh
+++ b/ostd/build/make.hh
@@ -132,7 +132,8 @@ private:
         if constexpr (std::is_constructible_v<std::string, R const &>) {
             p_deps.emplace_back(v);
         } else {
-            for (auto const &sv: v) {
+            R mr{v};
+            for (auto const &sv: mr) {
                 p_deps.emplace_back(sv);
             }
         }