extract few files from output channel which names match a string

[zillurbmb51]

Hi, I have a process that generates multiple output. I need few files in one of the subsequent processes.

output:
tuple val(chrom), path("chr${chrom}*.{bed,bim,fam}") into qc1_chr

from qc1_chr I need some files which names match a string (say, qc1_chr has 200 files, and only 22 file names have a string 'step10').
I tried with 'filter' operator but failed.
qc1_chr.filter(~/*step10*/) into qc2 But it does not work.
How could I extract those files into a new channel? Thanks in advance. Best, Zillur