Custom stack usage in pack command

[hariohmprasath]

Have a question related to custom stacks:
I created a custom stack using jam command, is there a way to specify the stack that should get used part of the pack build execution, instead of forking the entire builder and just replacing the [stack] section in builder.toml file. Thanks

[dmikusa]

No. You can change just the run image with an argument when you pack build. You can't change the build image though, unless you create a custom builder.