Solver error from pak

[latot]

Hi, I don't fully knows how to transform the pak instruction to pkgdepends, but taking advantage it says to report here lets do it:

docker run --rm -ti rocker/geospatial R

install.packages("pak")
pak::pkg_install("https://github.com/r-lib/pak")
unloadNamespace("pak")
pak::pkg_install("Rcpp?source")
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>.
---
Backtrace:
1. pak::pkg_install("Rcpp?source")
2. pak:::remote(function(...) get("pkg_install_make_plan", asNamespace("pak"))(...), …
3. err$throw(res$error)
---
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) …

Traceback

4: base::stop(cond)
3: err$throw(res$error)
2: remote(function(...) get("pkg_install_do_plan", asNamespace("pak"))(...), 
       list(proposal = NULL))
1: pak::pkg_install("Rcpp?source", dependencies = TRUE)

Thx!

[gaborcsardi]

You cannot use pak to install itself. If you want to install the dev version, you can install a nightly build from pak.r-lib.org/reference/install.html#nightly-builds

[latot]

This still happens, install pak with pak seems to work, tested with that docs too.