Compiling plrust functions offline?

[eceppda]

I have created a container image, mostly based on the example Dockerfile.try in this repo. My intent is to use it in a development environment where network access to index.crates.io is not available. I discovered yesterday when running the container in this environment that compiling a plrust function executes cargo build which requires access to crates. My question is- is there a way to either compile a plrust function (one without an explicit crates dependency) without making a network call to a creates index or rebuild my container image so that it's not necessary? Apologies if this question is not appropriate here, I am very new to Rust.