`minimap2` not found in singularity image

[Perugolate]

when trying to use Long mode using the singularity image:

./IRFinder Long -t 8 -r REF/gencode/ -d subtest sub1.fastq

I get the following error:

minimap2 not found ( executable: minimap2 ). To use the RunMode Long, install it: https://github.com/lh3/minimap2

If I shell into the image, then minimap2 seems to exist:

singularity shell IRFinder
Apptainer> echo $PATH

/Utils/bin/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

Apptainer> ls /Utils/bin/minimap2

/Utils/bin/minimap2

[Perugolate]

so the following works:

singularity exec -e ./IRFinder IRFinder Long -t 8 -r REF/gencode/ -d subtest05 sub1.fastq

whereas the following gets an error message:

./IRFinder Long -t 8 -r REF/gencode/ -d subtest06 sub1.fastq

minimap2 not found ( executable: minimap2 ). To use the RunMode Long, install it: https://github.com/lh3/minimap2

Other steps work for me without singularity exec -e ./IRFinder e.g. the following works:

./IRFinder BAM -l ...