[tbb-bugs] #32979 [Applications/Tor Browser]: `make clean` fails with missing package not mentioned in README

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#32979: `make clean` fails with missing package not mentioned in README
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     Reporter:  gk                        |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  tbb-rbm
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 I am trying to clean `tor-browser-build` artifacts by running `make clean`
 but I get
 {{{
 git submodule update --init
 ./tools/clean-old
 Can't locate File/Slurp.pm in @INC (you may need to install the
 File::Slurp module) (@INC contains: /home/gk/tor-browser-
 build/tools/../rbm/lib /etc/perl /usr/local/lib/x86_64-linux-
 gnu/perl/5.28.1 /usr/local/share/perl/5.28.1 /usr/lib/x86_64-linux-
 gnu/perl5/5.28 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.28
 /usr/share/perl/5.28 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu
 /perl-base) at ./tools/clean-old line 7.
 BEGIN failed--compilation aborted at ./tools/clean-old line 7.
 make: *** [Makefile:199: clean] Error 2
 }}}
 . Now, I've been following the `README` which mentions this cleaning
 mechanism but have all the packages mentioned there installed. I guess we
 should update that file to include the missing deps as well to
 successfully run `make clean`

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32979>
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