CPAN忽略makepl_arg和mbuild_arg

Question

我跟着最投票回答的說明這個問題How can I install a CPAN module into a local directory?，基本上說，我可以配置CPAN與本地安裝的模塊：

% cpan 
cpan> o conf makepl_arg INSTALL_BASE=/mydir/perl 
cpan> o conf commit 

cpan> o conf mbuild_arg '--install_base /mydir/perl' 
cpan> o conf commit 

然而，當我嘗試

% cpan 
% install List::Gen 

我的安裝失敗（它看起來像CPAN仍嘗試在系統路徑上安裝）。爲什麼？

cpan[4]> install List::Gen 
Going to read '/home/XXXX/.cpan/Metadata' 
    Database was generated on Mon, 04 Feb 2013 18:41:02 GMT 
Running install for module 'List::Gen' 
Running make for A/AS/ASG/List-Gen-0.974.tar.gz 
Checksum for /home/XXXX/.cpan/sources/authors/id/A/AS/ASG/List-Gen-0.974 
.tar.gz ok                 
Scanning cache /home/XXXX/.cpan/build for sizes 
............................................................................ 
DONE                  
/bin/tar: Read 9216 bytes from - 

    CPAN.pm: Going to build A/AS/ASG/List-Gen-0.974.tar.gz 

Created MYMETA.yml and MYMETA.json 
Creating new 'Build' script for 'List-Gen' version '0.974' 
Building List-Gen 
    ASG/List-Gen-0.974.tar.gz 
    ./Build --install_base /mydir/perl --install_base /mydir/perl -- OK                
Running Build test 
t/00-load.t ............... 1/1 # Testing List::Gen 0.974, Perl 5.014001, /SOME_SYSTEM_PATH/perl-5.14.1-x86_64/bin/perl   
t/00-load.t ............... ok 
t/01-load.t ............... ok 
t/02-load.t ............... ok 
t/03-load.t ............... ok 
t/04-load.t ............... ok 
t/05-load.t ............... ok 
t/06-load.t ............... ok 
t/listgen.t ............... ok   
t/listgen_builtins.t ...... ok 
t/listgen_lazy.t .......... ok  
t/listgen_lazy_haskell.t .. ok  
t/listgen_ops.t ........... ok  
t/listgen_perl6.t ......... ok  
t/listgenerator.t ......... ok  
t/pod-coverage.t .......... skipped: Test::Pod::Coverage 1.08 required for t 
esting POD coverage               
t/pod.t ................... ok 
t/threads.t ............... skipped: threads not yet supported in perl 5.13+ 
All tests successful. 
Files=17, Tests=1614, 6 wallclock secs (0.20 usr 0.11 sys + 3.12 cusr 0 
.60 csys = 4.03 CPU)              
Result: PASS 
    ASG/List-Gen-0.974.tar.gz 
    ./Build test -- OK 
Running Build install 
Building List-Gen 
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 
ERROR: Can't create '/SOME_SYSTEM_PATH/perl-5.14.1-x86_64/lib/site_perl/5.14.1/List' 
mkdir /SOME_SYSTEM_PATH/perl-5.14.1-x86_64/lib/site_perl/5.14.1/List: Permission denied a 
t /SOME_SYSTEM_PATH/perl-5.14.1-x86_64/lib/5.14.1/ExtUtils/Install.pm line 494.   

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 
at /SOME_SYSTEM_PATH/perl-5.14.1-x86_64/lib/site_perl/5.14.1/Module/Build/Base.pm line 3 
581.                  
    ASG/List-Gen-0.974.tar.gz 
    ./Build install -- NOT OK 
Failed during this command: 
ASG/List-Gen-0.974.tar.gz     : install NO 

Answer 1

這應該是mbuildpl_arg，不mbuild_arg

o conf mbuild_arg ''        # Fix past error 
o conf mbuildpl_arg '--install_base /mydir/perl' # Specify install base 
o conf commit          # Save changes