fix the incorrect dir reading

[LinuxSuRen]

No description provided.

[codecov]

Codecov Report

Merging #370 (c9d7f90) into master (579ac58) will increase coverage by 0.02%.
The diff coverage is 72.50%.

@@            Coverage Diff             @@
##           master     #370      +/-   ##
==========================================
+ Coverage   61.22%   61.24%   +0.02%     
==========================================
  Files          65       65              
  Lines        3484     3499      +15     
==========================================
+ Hits         2133     2143      +10     
- Misses       1244     1248       +4     
- Partials      107      108       +1     

Flag	Coverage Δ
unittests	61.24% <72.50%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/installer/fetch.go	15.13% <64.28%> (+3.94%)	⬆️
cmd/fetch.go	71.69% <66.66%> (ø)
cmd/root.go	78.46% <76.47%> (-3.21%)	⬇️
cmd/setup.go	75.47% <80.00%> (+0.47%)	⬆️
pkg/os/installer.go	88.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.