The "bug"/undocumented feature/behaviour is in the Pugs distribution, in the subroutine assert_ghc:

sub assert_ghc {
    my $self = shift;
    my $ghc = $self->can_run($ENV{GHC} || ( 'ghc' . $Config{_exe} ) );

...
[download]

It tries to find the ghc executable, or whatever you export in your environment as GHC. So in theory, the installation should work for you if you do:

GHC=`which ghc-6.4.1`
export GHC
cpan Pugs
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Corion,

Thanks for the pointer. Now my machine can recognize the latest GHC. But I still encounter such problem. Any idea why?

Writing Makefile for Span
Writing Makefile for Test
Writing Makefile for Test::Builder
Writing Makefile for Text::Glob
Writing Makefile for Tree
Writing Makefile for URI
Writing Makefile for WTemplate
Writing Makefile for Perl6::Pugs

*** Enter 'make' to build Pugs.  If compilation is too slow,
    consider using 'make unoptimized' instead.

cp lib/pugs/hack.pod /home/neversaint/.cpan/build/Perl6-Pugs-6.2.9/bli
+b/lib/pugs/hack.pod
cp lib/Perl6/Pugs.pm /home/neversaint/.cpan/build/Perl6-Pugs-6.2.9/bli
+b/lib/Perl6/Pugs.pm
cp lib/pugs/run.pod /home/neversaint/.cpan/build/Perl6-Pugs-6.2.9/blib
+/lib/pugs/run.pod
cp lib/Inline/Pugs.pm /home/neversaint/.cpan/build/Perl6-Pugs-6.2.9/bl
+ib/lib/Inline/Pugs.pm
cp lib/Perl6/MakeMaker.pm /home/neversaint/.cpan/build/Perl6-Pugs-6.2.
+9/blib/lib/Perl6/MakeMaker.pm
/usr/bin/perl -Iinc -Iutil -MPugsConfig -e "PugsConfig->write_config_m
+odule" > src/Pugs/Config.hs
/home/neversaint/.ghc/bin/ghc-6.4.1 -O0 -o src/gen_prelude src/gen_pre
+lude.hs
/home/neversaint/.ghc/bin/hsc2hs-6.4.1  -Isrc/syck  src/Data/Yaml/Syck
+.hsc
make: /home/neversaint/.ghc/bin/hsc2hs-6.4.1: Command not found
make: *** [src/Data/Yaml/Syck.hs] Error 127
make: *** Waiting for unfinished jobs....
  /usr/bin/make -j3 -- NOT OK
Running make test
  Can't test without successful make
Running make install
  make had returned bad status, install seems impossible
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---
neversaint and everlastingly indebted.......

The output is fairly clear:

make: /home/neversaint/.ghc/bin/hsc2hs-6.4.1: Command not found
[download]

So, there seems to be no file under the name /home/neversaint/.ghc/bin/hsc2hs-6.4.1, or the file is not executable. Most likely your installation of ghc is not complete or that tool needs to be built manually. I'm no expert in compiling and installing Pugs, so I recommend you take your problems to the maintainers of Pugs.

wild guess, since I don't know about your environment and I'm also not proficient in building pugs... Seems like ghc is living in ~/.ghc/bin. You've set

GHC=`which ghc-6.4.1`
export GHC
cpan Pugs
[download]

according to Corion's advice. Now the building system is looking for hsc2hs-6.4.1 - provide it. Look for hsc2hs in ~/.ghc/bin and make a symlink to it as hsc2hs-6.4.1

Or undefine the environment variable GHC and prepend your haskell directory to your path: PATH=~/.ghc/bin:$PATH so that the right haskell compiler is found (and the plain hsc2hs). Hope that's close to accurate and helpful ;-)

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

make: /home/neversaint/.ghc/bin/hsc2hs-6.4.1: Command not found make: *** src/Data/Yaml/Syck.hs Error 127

I got this same error when trying to build it manually. I fiddled around and finally gave up.

I was going to ask when the version of Perl6 will be ready that builds as easily and well as Perl5, based just on 'c'.

---

I'm not really a human, but I play one on earth. Cogito ergo sum a bum