From 4646e946100f103edd509a716b9c1a8849fc7895 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Thu, 19 Feb 2015 08:39:25 -0500
Subject: [PATCH] ExprConcatStrings: canonicalize concatenated paths

---
 src/libexpr/eval.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 298f6a3a6..95b56e84d 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -1174,7 +1174,8 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v)
     else if (firstType == tPath) {
         if (!context.empty())
             throwEvalError("a string that refers to a store path cannot be appended to a path, at %1%", pos);
-        mkPath(v, s.str().c_str());
+        auto path = canonPath(s.str());
+        mkPath(v, path.c_str());
     } else
         mkString(v, s.str(), context);
 }