Why does Module::Build want rebuild every time

ait has asked for the wisdom of the Perl Monks concerning the following question:

Why does Module::Build try to rebuild every time (or most of the time I'm not sure). See example:

perl -e "use Module::Build"
(no errors)
curl -L https://cpanmin.us | perl - -M https://cpan.metacpan.org -n IO::Socket::IP
...snip...
--> Working on IO::Socket::IP
Fetching https://cpan.metacpan.org/authors/id/P/PE/PEVANS/IO-Socket-IP-0.39.tar.gz ... OK
==> Found dependencies: Module::Build
--> Working on Module::Build
Fetching https://cpan.metacpan.org/authors/id/L/LE/LEONT/Module-Build-0.4224.tar.gz ... OK
==> Found dependencies: Module::Build
Configuring Module-Build-0.4224 ... OK
...snip...
Failed to upconvert metadata to 1.1. Errors:
Missing mandatory field, 'version' (version) [Validation: 1.0]
 at - line 32.

So even though Module::Build was installed it will always try to install again. I have noticed this behaviour for many packages. Why is this so? can it be prevented with some switch ?

I'm trying to install Mojolicious on OpenWRT and the native Module::Build intsalls fine but if I try to install via CPAN I get the error above. I want the Arduino YÚN community to have an alternative to Node.JS and Python !! Please help !

TIA
Alex

Comment on Why does Module::Build want rebuild every time

Replies are listed 'Best First'.
Re: Why does Module::Build want rebuild every time by Corion (Patriarch) on Sep 11, 2017 at 14:23 UTC
Maybe a more recent version of Module::Build is available on CPAN. I think all CPAN tools will (if you let them) try to upgrade all modules in the direct dependency chain to their most recent version. Maybe IO::Socket::IP requires a certain minimum version of Module::Build to build itself. If you want to avoid rebuilding/reinstalling Module::Build, try a manual configuration of IO::Socket::IP using these five commands: `cpanm --look IO::Socket::IP perl Makefile.PL make make test make install` [download]	[reply] [d/l]
Re^2: Why does Module::Build want rebuild every time by ait (Hermit) on Sep 12, 2017 at 02:56 UTC
Thanks for your prompt reply! I was trying to avoid CPAN shell but it all got very complicated after that. Turns out Test::More requires Storable which is XS and that made me install gcc and make, which is not even available, etc. etc. so it got pretty hairy but incredibly I got it working. I actually have Mojolicious running on an Arduino Yún !!! I kept pretty good notes so I decided to make this tutorial to help others and possibly get some collaboration to make this more native to the OpenWRT crowd: Embedded Perl: Installing Perl and Mojolicious on Arduino Yún / OpenWRT ChaosCalmer	[reply]


Syntactic Confectionery Delight
	PerlMonks