presence of dynamic packages leads to linking error during `leeway exec`

Bug description

leeway exec cannot find the dynamic package install/preview:docker (when it is building the dependency tree?) and fails with:

gitpod /workspace/gitpod/components/server (gpl/12758-list-plans) $ yarn watch
yarn run v1.22.19
$ leeway exec --package .:app --transitive-dependencies --filter-type yarn --components --parallel -- yarn build -w --preserveWatchOutput
FATA[0000] cannot load workspace                         error="linking error in package components:all: package \"install/preview:docker\" is unknown"
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Steps to reproduce

• open https://gitpod.io/#https://github.com/gitpod-io/gitpod/commit/1516e4c4dfdfbf54660b60860d80fb37aa840a1c
• cd components/server
• yarn watch

Expected behavior

It should execute yarn builds instead

Example repository

No response

Anything else?

No response

Start with the leeway exec workspace-loading and dependency-tree linking path, then reproduce the failure from components/server with yarn watch at the referenced commit. Trace why install/preview:docker is treated as unknown; done means the command resolves the dynamic package and executes the yarn builds.