[DRE-maint] Bug#981173: gem2deb: FTBFS on ia64, can't find gem rake with executable rake

[Laurent Bigonville]

Source: gem2deb
Version: 1.2.1
Severity: important
Tags: ftbfs
Justification: fails to build from source (but built successfully in the past)

Hello,

It looks like that gem2deb FTBFS on ia64 since version 1.2.1:

   debian/rules override_dh_auto_build
make[1]: Entering directory '/<<PKGBUILDDIR>>'
# NO_PKG_MANGLE=1 only useful on Ubuntu buildds, to disable pkgbinarymangler
NO_PKG_MANGLE=1 ruby2.5 -S rake test:unit TESTOPTS=-v
/usr/lib/ruby/2.5.0/rubygems.rb:284:in `find_spec_for_exe': can't find gem rake (>= 0.a) with executable rake (Gem::GemNotFoundException)
        from /usr/lib/ruby/2.5.0/rubygems.rb:303:in `activate_bin_path'
        from /usr/bin/rake:23:in `<main>'
make[1]: *** [debian/rules:22: ruby2.5] Error 1

Not sure what's happening here, the dependency seems installed

Kind regards,
Laurent Bigonville

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-2-amd64 (SMP w/8 CPU threads)
Locale: LANG=fr_BE.UTF-8, LC_CTYPE=fr_BE.UTF-8 (charmap=UTF-8), LANGUAGE=fr_BE:fr
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: SELinux: enabled - Mode: Permissive - Policy name: refpolicy