error about install parallel

[hanguojun007]

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pak::pkg_install("parallel") ✔ Loading metadata database ... done Error:
! error in pak subprocess Caused by error in pkgplan_solve(self, private, match.arg(policy)): ! Error in dependency solver, cannot solve installation. ℹ Solver status: -1. ℹ This is an internal error in pkgdepends, please report an issue at https://github.com/r-lib/pkgdepends/issues. Type .Last.error to see the more details.

.Last.error <callr_error/rlib_error_3_0/rlib_error/error> Error: ! error in pak subprocess Caused by error in pkgplan_solve(self, private, match.arg(policy)): ! Error in dependency solver, cannot solve installation. ℹ Solver status: -1. ℹ This is an internal error in pkgdepends, please report an issue at https://github.com/r-lib/pkgdepends/issues.

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Backtrace:

1. pak::pkg_install("parallel")
2. pak:::remote(function(...) get("pkg_install_make_plan", asNamespace("pak"))(...), …
3. err$throw(res$error)

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Subprocess backtrace:

1. base::withCallingHandlers(cli_message = function(msg) { …
2. get("pkg_install_make_plan", asNamespace("pak"))(...)
3. prop$solve()
4. private$plan$solve(policy = private$policy)
5. pkgdepends:::pkgplan_solve(self, private, match.arg(policy))
6. base::throw(pkg_error("Error in dependency solver, cannot solve installation.", …
7. | base::signalCondition(cond)
8. global (function (e) …

[gaborcsardi]

parallel is a base package, it comes with R.