From 301386770209a734cc7c64918a39136a74c83d9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gutyina=20Gerg=C5=91?= <gutyina.gergo.2@gmail.com>
Date: Wed, 9 Apr 2025 22:51:34 +0200
Subject: [PATCH] pnpm.configHook: improve error message when install fails due
 to old hash

---
 .../tools/pnpm/fetch-deps/pnpm-config-hook.sh      | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/tools/pnpm/fetch-deps/pnpm-config-hook.sh b/pkgs/development/tools/pnpm/fetch-deps/pnpm-config-hook.sh
index 09652b8c6965..f66f06c0a867 100644
--- a/pkgs/development/tools/pnpm/fetch-deps/pnpm-config-hook.sh
+++ b/pkgs/development/tools/pnpm/fetch-deps/pnpm-config-hook.sh
@@ -44,11 +44,23 @@ pnpmConfigHook() {
 
     runHook prePnpmInstall
 
-    pnpm install \
+    if ! pnpm install \
         --offline \
         --ignore-scripts \
         "${pnpmInstallFlags[@]}" \
         --frozen-lockfile
+    then
+        echo
+        echo "ERROR: pnpm failed to install dependencies"
+        echo
+        echo "If you see ERR_PNPM_NO_OFFLINE_TARBALL above this, follow these to fix the issue:"
+        echo '1. Set pnpmDeps.hash to "" (empty string)'
+        echo "2. Build the derivation and wait for it to fail with a hash mismatch"
+        echo "3. Copy the 'got: sha256-' value back into the pnpmDeps.hash field"
+        echo
+
+        exit 1
+    fi
 
 
     echo "Patching scripts"