From 3d77a15338b385edf63967fe92d3c4aad058a762 Mon Sep 17 00:00:00 2001
From: Clara Engler <cve@cve.cx>
Date: Fri, 18 Sep 2026 09:59:08 +0200
Subject: [PATCH] libresprite: fix build issue on aarch64-darwin

Fixes #564475 by checking for the existence of the file before calling
substitute on it.
---
 pkgs/by-name/li/libresprite/package.nix | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/pkgs/by-name/li/libresprite/package.nix b/pkgs/by-name/li/libresprite/package.nix
index 87df7ef2e689..5e9898612924 100644
--- a/pkgs/by-name/li/libresprite/package.nix
+++ b/pkgs/by-name/li/libresprite/package.nix
@@ -88,9 +88,11 @@ stdenv.mkDerivation (finalAttrs: {
       install -Dm644 "$src"/doc"$size".png "$dst"/mimetypes/aseprite.png
     done
 
-    substituteInPlace $out/share/thumbnailers/libresprite.thumbnailer \
-      --replace-fail "TryExec=libresprite-thumbnailer" "TryExec=$out/bin/libresprite-thumbnailer" \
-      --replace-fail "Exec=libresprite-thumbnailer" "Exec=$out/bin/libresprite-thumbnailer"
+    if [ -f $out/share/thumbnailers/libresprite.thumbnailer ]; then
+      substituteInPlace $out/share/thumbnailers/libresprite.thumbnailer \
+        --replace-fail "TryExec=libresprite-thumbnailer" "TryExec=$out/bin/libresprite-thumbnailer" \
+        --replace-fail "Exec=libresprite-thumbnailer" "Exec=$out/bin/libresprite-thumbnailer"
+    fi
   '';
 
   passthru.tests = {