$ GOPHERJS_GOROOT="$(go1.18.10 env GOROOT)" gopherjs build
failed to expand patterns []: failed to list packages in the primary context: failed to list packages on FS: go tool error: /home/makki/Development/go/bin/go list -e -compiler=gc -tags=netgo,purego,math_big_pure_go,gopherjs -installsuffix= -f={{.ImportPath}} --: exit status 1
go: updates to go.mod needed; to update it:
        go mod tidy

This error occurred when the built module targets a version earlier than go 1.21.0 in go.mod, while the imported package targets go 1.21.0.
In such cases, go 1.21.0 requires us to run go mod tidy, which was not required in previous versions of go.

Please see the example for detail: github.com/makiuchi-d/gopherjs-fail-example

In the GopherJS build process, gopherjs calls go, and go 1.21.0 is used when it's installed under the $PATH.
To avoid this error, we should use $GOPHERJS_GOROOT/bin/go instead of the go under the $PATH.