From 465a167c4347cd208f39670bad349fc61bb42d3d Mon Sep 17 00:00:00 2001
From: Shay Bergmann <shaybergmann@gmail.com>
Date: Wed, 27 Oct 2021 19:01:32 +0000
Subject: [PATCH] nix-instantiate: pass pos in the `--eval --json` code path

---
 src/nix-instantiate/nix-instantiate.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nix-instantiate/nix-instantiate.cc b/src/nix-instantiate/nix-instantiate.cc
index ac48682c7..fbc697864 100644
--- a/src/nix-instantiate/nix-instantiate.cc
+++ b/src/nix-instantiate/nix-instantiate.cc
@@ -52,7 +52,7 @@ void processExpr(EvalState & state, const Strings & attrPaths,
             if (output == okXML)
                 printValueAsXML(state, strict, location, vRes, std::cout, context);
             else if (output == okJSON)
-                printValueAsJSON(state, strict, vRes, noPos, std::cout, context);
+                printValueAsJSON(state, strict, vRes, v.determinePos(noPos), std::cout, context);
             else {
                 if (strict) state.forceValueDeep(vRes);
                 std::cout << vRes << std::endl;