cleanup = true doesn't work for local cleanup in hybrid workflows

[rzelle-lallemand]

Bug report

We have an in-house Nextflow 26.04 pipeline that mostly runs on-prem, but some of the processes are performed with AWS Batch. These runs create a local work directory and a remote one (specified with -bucket-dir). I understand that remote cleanup isn't supported (see #5091 (comment) and https://docs.seqera.io/nextflow/reference/config#cleanup). However, I would expect local cleanup to work in hybrid workflows, but this doesn't work.

Expected behavior and actual behavior

With "cleanup = true", I expect the local work directory to be cleaned up, even if Nextflow doesn't want to touch the remote work directory. Instead, Nextflow fails to perform a local cleanup.

Steps to reproduce the problem

Use "cleanup = true" in nextflow.config in a hybrid on-prem/AWS Batch workflow.

Program output

Jul-14 14:06:31.475 [main] WARN  nextflow.Session - Failed to cleanup work dir: /projectA/temp/nextflow-pipeline/run_2026-07-14/work
java.lang.IllegalStateException: Missing plugin 'nf-amazon' required to read file: s3://private-bucket/48/299e411a526eb1453a5a2acfa0f721
	at nextflow.file.FileHelper.asPath(FileHelper.groovy:409)
	at nextflow.file.FileHelper.asPath0(FileHelper.groovy:362)
	at nextflow.file.FileHelper.asPath(FileHelper.groovy:345)
	at nextflow.Session$_cleanup_closure41.doCall(Session.groovy:1165)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:343)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:328)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:280)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1009)
	at groovy.lang.Closure.call(Closure.java:433)
	at nextflow.cache.CacheDB.eachRecord(CacheDB.groovy:212)
	at nextflow.Session.cleanup(Session.groovy:1161)
	at nextflow.script.ScriptRunner.shutdown(ScriptRunner.groovy:246)
	at nextflow.script.ScriptRunner.execute(ScriptRunner.groovy:136)
	at nextflow.cli.CmdRun.run(CmdRun.groovy:442)
	at nextflow.cli.Launcher.run(Launcher.groovy:526)
	at nextflow.cli.Launcher.main(Launcher.groovy:686)

Environment

• Nextflow version: 26.04.2
• Java version: [?]
• Operating system: Linux
• Bash version: GNU bash, version 5.1.8(1)-release (x86_64-redhat-linux-gnu)

Additional context

(Add any other context about the problem here)