Doesn't compile using Linuxbrew

[simpsora]

I don't know if we have anyone not using macOS, but the question was asked about Linux users so I decided to take it for a spin. It fails to compile, but perhaps for a silly reason (e.g. one not related to the code itself not working):

==> Installing envato/envato-iamy/iamy
==> go build -ldflags -s -w -X main.Version=v3.0.0+envato
Last 15 lines from /root/.cache/Homebrew/Logs/iamy/01.go:

go: downloading gopkg.in/alecthomas/kingpin.v2 v2.2.6
go: downloading github.com/blang/semver/v4 v4.0.0
go: downloading github.com/fatih/color v1.7.0
go: downloading github.com/aws/aws-sdk-go v1.16.23
go: downloading github.com/pkg/errors v0.8.1
go: downloading github.com/ghodss/yaml v1.0.0
go: downloading github.com/mattn/go-colorable v0.0.9
go: downloading github.com/mattn/go-isatty v0.0.4
go: downloading github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc
go: downloading github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf
go: downloading gopkg.in/yaml.v2 v2.2.2
go: downloading github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af
# runtime/cgo
gcc-11: error: unrecognized command-line option '-mmacosx-version-min=10.15'

Brew config:

root@bfd92d33185a:/# brew config
HOMEBREW_VERSION: 3.2.0
ORIGIN: https://github.com/Homebrew/brew
HEAD: 09f7bc27a99469cf947431df4754737dfbadb31d
Last commit: 8 days ago
Core tap ORIGIN: https://github.com/Homebrew/linuxbrew-core
Core tap HEAD: 4ab9416e21635c120f63da3eb55c32a142b0e82e
Core tap last commit: 4 hours ago
Core tap branch: master
HOMEBREW_PREFIX: /home/linuxbrew/.linuxbrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 8
Homebrew Ruby: 2.6.3 => /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/2.6.3_2/bin/ruby
CPU: octa-core 64-bit skylake
Clang: 12.0.0 build (parse error)
Git: 2.25.1 => /bin/git
Curl: 7.68.0 => /usr/bin/curl
Kernel: Linux 4.19.121-linuxkit x86_64 GNU/Linux
OS: Unknown
Host glibc: 2.31
/usr/bin/gcc: 9.3.0
/usr/bin/ruby: N/A
glibc: N/A
gcc@5: N/A
xorg: N/A

System:

root@bfd92d33185a:/# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.2 LTS"

Full brew install log attached.
iamy-linux-brew-log.txt