hubstaff: Fix quoting for older Nix versions

Issue #31179.

Changed files
+1 -1
pkgs
applications
misc
hubstaff
+1 -1
pkgs/applications/misc/hubstaff/default.nix
···
# MojoSetups have a ZIP file at the end. ZIP’s magic string is
# most often PK\x03\x04. This *should* work for future updates,
# but feel free to come up with something more reasonable.
-
dataZipOffset=$(grep --max-count=1 --byte-offset --only-matching --text $'PK\x03\x04' $curSrc | cut -d: -f1)
+
dataZipOffset=$(grep --max-count=1 --byte-offset --only-matching --text ''$'PK\x03\x04' $curSrc | cut -d: -f1)
dd bs=$dataZipOffset skip=1 if=$curSrc of=data.zip 2>/dev/null
unzip -q data.zip "data/*"
rm data.zip