@Richard Miller
I had installed go following 
http://docs.9front.org/building-go

I do have permissions to the $GOROOT tree.
And other than the go binary I do not see any go files under src. 
Would I even have a cache considering i've never successfully built a go project yet?

term% cd $GOROOT
term% pwd
/sys/lib/go/amd64-1.15.2
term% touch test.t
term% ls src
src/Make.dist
src/README.vendor
src/all.bash
src/all.bat
src/all.rc
src/archive
src/bootstrap.bash
src/bufio
src/buildall.bash
src/builtin
src/bytes
src/clean.bash
src/clean.bat
src/clean.rc
src/cmd
src/cmp.bash
src/compress
src/container
src/context
src/crypto
src/database
src/debug
src/encoding
src/errors
src/expvar
src/flag
src/fmt
src/go
src/go.mod
src/go.sum
src/hash
src/html
src/image
src/index
src/internal
src/io
src/iostest.bash
src/log
src/make.bash
src/make.bat
src/make.rc
src/math
src/mime
src/net
src/os
src/path
src/plugin
src/race.bash
src/race.bat
src/reflect
src/regexp
src/run.bash
src/run.bat
src/run.rc
src/runtime
src/sort
src/strconv
src/strings
src/sync
src/syscall
src/testdata
src/testing
src/text
src/time
src/unicode
src/unsafe
src/vendor