From 2bd3aa4bc265d34b8ab18e917261b0dc24c5076d Mon Sep 17 00:00:00 2001
From: Andrew Childs <lorne@cons.org.nz>
Date: Tue, 9 Feb 2021 12:51:09 +0900
Subject: [PATCH] Revert "Revert "stdenv/patchShebangs: avoid temporary time
 reference file""

This reverts commit df21fb8afa235a71b4e814f1ed1c4003ce34b220.
---
 pkgs/build-support/setup-hooks/patch-shebangs.sh | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/pkgs/build-support/setup-hooks/patch-shebangs.sh b/pkgs/build-support/setup-hooks/patch-shebangs.sh
index bd254be24f9..d0efe039ced 100644
--- a/pkgs/build-support/setup-hooks/patch-shebangs.sh
+++ b/pkgs/build-support/setup-hooks/patch-shebangs.sh
@@ -88,17 +88,15 @@ patchShebangs() {
         newInterpreterLine=${newInterpreterLine%${newInterpreterLine##*[![:space:]]}}
 
         if [[ -n "$oldPath" && "${oldPath:0:${#NIX_STORE}}" != "$NIX_STORE" ]]; then
-            if [[ -n "$newPath" ]] && [[ "$newPath" != "$oldPath" ]]; then
+            if [[ -n "$newPath" && "$newPath" != "$oldPath" ]]; then
                 echo "$f: interpreter directive changed from \"$oldInterpreterLine\" to \"$newInterpreterLine\""
                 # escape the escape chars so that sed doesn't interpret them
                 escapedInterpreterLine=${newInterpreterLine//\\/\\\\}
 
                 # Preserve times, see: https://github.com/NixOS/nixpkgs/pull/33281
-                timestamp=$(mktemp)
-                touch -r "$f" "$timestamp"
+                timestamp=$(stat --printf "%y" "$f")
                 sed -i -e "1 s|.*|#\!$escapedInterpreterLine|" "$f"
-                touch -r "$timestamp" "$f"
-                rm "$timestamp"
+                touch --date "$timestamp" "$f"
             fi
         fi
     done < <(find "$@" -type f -perm -0100 -print0)