Install the correct dependency version into the sandbox

[josephmturner]

Example problem: When a built-in dependency has newer version available on ELPA, and the newer version is specified in the Package-Requires of our package, the newer version is not installed, and makem tests our package using the older, built-in version.

makem could call package-install to install the library as a package, which would use the built-in machinery to install dependencies at their correct versions.

[alphapapa]

Thanks. I think this is technically a bug, because even if --install-deps is used, that won't cause a built-in package to be upgraded to the ELPA version. It just happens rarely in practice (so far, anyway--it's likely to happen more often as more core packages are also put on ELPA).

[josephmturner]

IIUC, this bug is causing the hyperdrive.el build manifests to fail since the tests are running with the built-in version instead of the latest version which includes this fix.

[josephmturner]

Thank you!! Adam Porter ***@***.***> writes:

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