--profile conda gives "Failed to create Conda environment" error

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I am really stuck with something. I have an nf-core module that was working well, then suddenly, I think I updated the bioconda package that it uses, it just hangs for a long time when I try to test with --profile conda (it works fine with --profile singularity).

I am doing:

nf-test test --tag coptr/index --profile conda --update-snapshot

and I get:

🚀 nf-test 0.9.2
https://www.nf-test.com
(c) 2021 - 2024 Lukas Forer and Sebastian Schoenherr

Load .nf-test/plugins/nft-bam/0.3.0/nft-bam-0.3.0.jar
Load .nf-test/plugins/nft-compress/0.1.0/nft-compress-0.1.0.jar
Load .nf-test/plugins/nft-vcf/1.0.7/nft-vcf-1.0.7.jar
Warning: every snapshot that fails during this test run is re-record.

Test Process COPTR_INDEX

  Test [fed7e189] 'coptr index with single fastq' Assertion failed: 

assert process.success
       |       |
       |       false
       COPTR_INDEX

FAILED (7203.831s)

  Assertion failed: 
  
  1 of 2 assertions failed
  
  Nextflow stdout:
  
  ERROR ~ Error executing process > 'COPTR_INDEX'
  
  Caused by:
    Failed to create Conda environment
      command: conda env create --prefix /gpfs1/home/r/b/rbarrant/projects/nfcorePipelines/modules/.nf-test/tests/fed7e18906b7e8b55696337c0af814bc/work/conda/environment-b8765177d9aaff5e205b905733f14221 --file /gpfs1/home/r/b/rbarrant/projects/nfcorePipelines/modules/modules/nf-core/coptr/index/tests/../environment.yml
      status : 143
      message:
        Retrieving notices: ...working... done
        Collecting package metadata (repodata.json): ...working... done
        Solving environment: ...working...
  
  
  
   -- Check '/gpfs1/home/r/b/rbarrant/projects/nfcorePipelines/modules/.nf-test/tests/fed7e18906b7e8b55696337c0af814bc/meta/nextflow.log' file for details
  Nextflow stderr:
  
  Exception in thread "Thread-2" groovy.lang.GroovyRuntimeException: exception while reading process stream
        at org.codehaus.groovy.runtime.ProcessGroovyMethods$TextDumper.run(ProcessGroovyMethods.java:502)
        at java.base/java.lang.Thread.run(Thread.java:840)
  Caused by: java.io.IOException: Stream closed
        at java.base/java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:168)
        at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:334)
        at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:281)
        at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:324)
        at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:189)
        at java.base/java.io.InputStreamReader.read(InputStreamReader.java:177)
        at java.base/java.io.BufferedReader.fill(BufferedReader.java:162)
        at java.base/java.io.BufferedReader.readLine(BufferedReader.java:329)
        at java.base/java.io.BufferedReader.readLine(BufferedReader.java:396)
        at org.codehaus.groovy.runtime.ProcessGroovyMethods$TextDumper.run(ProcessGroovyMethods.java:495)
        ... 1 more