Die Installation des CPAN-Perl-Moduls auf RHEL 7 schlägt fehl (Amazon EC2)

Ich versuche, x2goserver auf meinem RHEL 7-Server zu installieren. Ich bin genau wie die Frage hier auf Abhängigkeiten gestoßen (ich bin nicht mit Perl oder CPAN vertraut, ich möchte nur einen funktionierenden x2goserver). Als ich also versuchte, die CPAN-Perl-Module wie in der Antwort beschrieben zu installieren, stieß ich auf die folgende Ausgabe :

$ sudo cpan Terminal does not support AddHistory.  cpan shell -- CPAN exploration and modules installation (v1.9800) Enter 'h' for help.  cpan[1]> install File::Which Reading '/root/.cpan/Metadata' Database was generated on Thu, 14 Jul 2016 21:53:35 GMT Fetching with HTTP::Tiny: http://mirror.ox.ac.uk/sites/www.cpan.org/authors/01mailrc.txt.gz Reading '/root/.cpan/sources/authors/01mailrc.txt.gz' ............................................................................DONE Fetching with HTTP::Tiny: http://mirror.ox.ac.uk/sites/www.cpan.org/modules/02packages.details.txt.gz Reading '/root/.cpan/sources/modules/02packages.details.txt.gz' Database was generated on Fri, 15 Jul 2016 22:17:02 GMT HTTP::Date not available ............. New CPAN.pm version (v2.14) available. [Currently running version is v1.9800] You might want to try install CPAN reload cpan to both upgrade CPAN.pm and run the new version without leaving the current session.   ...............................................................DONE Fetching with HTTP::Tiny: http://mirror.ox.ac.uk/sites/www.cpan.org/modules/03modlist.data.gz Reading '/root/.cpan/sources/modules/03modlist.data.gz' DONE Writing /root/.cpan/Metadata Running install for module 'File::Which' Running make for P/PL/PLICEASE/File-Which-1.21.tar.gz Checksum for /root/.cpan/sources/authors/id/P/PL/PLICEASE/File-Which-1.21.tar.gz ok Scanning cache /root/.cpan/build for sizes ............................................................................DONE  CPAN.pm: Building P/PL/PLICEASE/File-Which-1.21.tar.gz  Checking if your kit is complete... Looks good Writing Makefile for File::Which Could not read metadata file. Falling back to other methods to determine prerequisites cp lib/File/Which.pm blib/lib/File/Which.pm Manifying blib/man3/File::Which.3pm PLICEASE/File-Which-1.21.tar.gz /bin/make -- OK Running make test PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t t/00_diag.t ..... 1/1 #  #  #  # HARNESS_ACTIVE=1 # HARNESS_VERSION=3.28 # LANG=en_US.UTF-8 # LC_ADDRESS=tr_TR.UTF-8 # LC_IDENTIFICATION=tr_TR.UTF-8 # LC_MEASUREMENT=tr_TR.UTF-8 # LC_MONETARY=tr_TR.UTF-8 # LC_NAME=tr_TR.UTF-8 # LC_NUMERIC=tr_TR.UTF-8 # LC_PAPER=tr_TR.UTF-8 # LC_TELEPHONE=tr_TR.UTF-8 # LC_TIME=tr_TR.UTF-8 # PERL5LIB=/root/.cpan/build/File-Which-1.21-lieZ00/blib/lib:/root/.cpan/build/File-Which-1.21-lieZ00/blib/arch: # PERL5OPT= # PERL5_CPANPLUS_IS_RUNNING=3630 # PERL5_CPAN_IS_RUNNING=3630 # PERL_DL_NONLAZY=1 # SHELL=/bin/bash #  #  #  # PERL5LIB path # /root/.cpan/build/File-Which-1.21-lieZ00/blib/lib # /root/.cpan/build/File-Which-1.21-lieZ00/blib/arch #  #  #  # perl 5.016003 # ExtUtils::MakeMaker 6.68 # Test::More 1.302040 #  #  #  t/00_diag.t ..... ok  t/01_compile.t .. ok  t/02_all.t ...... Can't locate Env.pm in @INC (@INC contains: /root/.cpan/build/File-Which-1.21-lieZ00/blib/lib /root/.cpan/build/File-Which-1.21-lieZ00/blib/arch /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at t/02_all.t line 3. BEGIN failed--compilation aborted at t/02_all.t line 3. t/02_all.t ...... Dubious, test returned 2 (wstat 512, 0x200) No subtests run  t/03_simple.t ... Can't locate Env.pm in @INC (@INC contains: /root/.cpan/build/File-Which-1.21-lieZ00/blib/lib /root/.cpan/build/File-Which-1.21-lieZ00/blib/arch /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at t/03_simple.t line 6. BEGIN failed--compilation aborted at t/03_simple.t line 6. # Looks like your test exited with 2 before it could output anything. t/03_simple.t ... Dubious, test returned 2 (wstat 512, 0x200) Failed 10/10 subtests  t/04_pwhich.t ... ok   Test Summary Report ------------------- t/02_all.t (Wstat: 512 Tests: 0 Failed: 0) Non-zero exit status: 2 Parse errors: No plan found in TAP output t/03_simple.t (Wstat: 512 Tests: 0 Failed: 0) Non-zero exit status: 2 Parse errors: Bad plan. You planned 10 tests but ran 0. Files=5, Tests=5, 0 wallclock secs ( 0.02 usr 0.01 sys + 0.17 cusr 0.01 csys = 0.21 CPU) Result: FAIL Failed 2/5 test programs. 0/5 subtests failed. make: *** [test_dynamic] Error 255 PLICEASE/File-Which-1.21.tar.gz /bin/make test -- NOT OK //hint// to see the cpan-testers results for installing this module, try: reports PLICEASE/File-Which-1.21.tar.gz Running make install make test had returned bad status, won't install without force Failed during this command: PLICEASE/File-Which-1.21.tar.gz : make_test NO