Can't pass -extldflags -static because it's not valid for go get

I would like to be able to statically build Caddy with https://github.com/mliezun/caddy-snake Running `CGO_ENABLED=1 XCADDY_GO_BUILD_FLAGS='-extldflags -static' xcaddy build --output /caddy --with github.com/mliezun/caddy-snake` results in ``` 0.345 2025/06/30 11:34:32 [INFO] exec (timeout=0s): /usr/local/go/bin/go get -v -extldflags -static github.com/caddyserver/caddy/v2 0.347 flag provided but not defined: -extldflags ``` Perhaps not all flags should be passed to `go get`, or there should be a way to tell xcaddy to link statically, or another environment variable should be used for LDFLAGS.