Building Docker image on ZFS file system fails

[TheCasualObserver]

Describe the bug
I am unable to compile the docker image while using ZFS as file system.

To Reproduce
Steps to reproduce the behavior:

1. clone git repository
2. make adjustments to config files and add dependency on some plugins
3. docker compose build

it fails with a message similar to:

30.21  ERR_PNPM_EAGAIN  EAGAIN: resource temporarily unavailable, copyfile '/root/.local/share/pnpm/store/v10/files/6b/8aae75aeaa2150548d86f1f0025cec9ddbc7dfa3c1f51e87de87721ec64ef31b60da2b04871838ca951cea1bb83af0dc518ab16d08e5334119d12aef4de27b' -> '/opt/etherpad-lite/node_modules/.pnpm/source-map-js@1.2.1/node_modules/source-map-js_tmp_1/LICENSE'
------
[+] build 0/1
 ⠙ Image my/etherpad2:latest Building                                                         35.0s
Dockerfile:12
--------------------
  10 |     WORKDIR /opt/etherpad-lite
  11 |     COPY . .
  12 | >>> RUN pnpm install
  13 |     RUN pnpm run build:ui
  14 |     
--------------------

It is very likely, that this problem is on the side of pnpm and ZFS. So I don't expect that the workaround, I describe below, will be added to this repository. But I hope, that others who run into this problem, have an easier time resolving the problem.

Expected behavior
I would expect that building the image works.

Workaround

The workaround described here helped me to mitigate the problem:
pnpm/pnpm#7024 (comment)

With the following changes I was able to get a completed docker image build:

diff --git a/Dockerfile b/Dockerfile
index 1b0a45d1a..0c21ebb09 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ FROM node:lts-alpine AS adminbuild
 RUN npm install -g pnpm@latest
 WORKDIR /opt/etherpad-lite
 COPY . .
-RUN pnpm install
+RUN pnpm install --package-import-method=hardlink
 RUN pnpm run build:ui
 
 
diff --git a/bin/installDeps.sh b/bin/installDeps.sh
index af2b5e30a..0f416a77b 100755
--- a/bin/installDeps.sh
+++ b/bin/installDeps.sh
@@ -36,10 +36,10 @@ fi
 log "Installing dependencies..."
 if [ -z "${ETHERPAD_PRODUCTION}" ]; then
   log "Installing dev dependencies with pnpm"
-  pnpm --recursive i  || exit 1
+  pnpm --recursive i --package-import-method=hardlink || exit 1
 else
   log "Installing production dependencies with pnpm"
-  pnpm --recursive i --production || exit 1
+  pnpm --recursive i --production --package-import-method=hardlink || exit 1
 fi
 
 # Remove all minified data to force node creating it new
diff --git a/bin/installLocalPlugins.sh b/bin/installLocalPlugins.sh
index 15442e646..d99ec4a86 100755
--- a/bin/installLocalPlugins.sh
+++ b/bin/installLocalPlugins.sh
@@ -39,7 +39,7 @@ if [ ! -z "${ETHERPAD_LOCAL_PLUGINS}" ]; then
     plugin=$(trim "$plugin")
     if [ -d "local_plugins/${plugin}" ]; then
       echo "Installing plugin: '${plugin}'"
-      pnpm install -w ${PNPM_OPTIONS:-} "local_plugins/${plugin}/"
+      pnpm install -w ${PNPM_OPTIONS:-} "local_plugins/${plugin}/" --package-import-method=hardlink
     else
       ( echo "Error. Directory 'local_plugins/${plugin}' for local plugin " \
              "'${plugin}' missing" >&2 )
diff --git a/bin/updatePlugins.sh b/bin/updatePlugins.sh
index 8d0f43fd5..40a9a0236 100755
--- a/bin/updatePlugins.sh
+++ b/bin/updatePlugins.sh
@@ -8,4 +8,4 @@ OUTDATED=$(npm outdated --depth=0 | awk '{print $1}' | grep '^ep_') || {
 }
 set -- ${OUTDATED}
 echo "Updating plugins: $*"
-exec pnpm install "$@"
+exec pnpm install "$@" --package-import-method=hardlink

Server (please complete the following information):

• Etherpad version: V2.6.1 [fad0297]
• OS: debian trixie
• Docker: version 29.2.1, build a5c7197
• ZFS: zfs-2.3.2-2