# Can't install Polars and DuckDB on windows 11

**URL:** <https://discourse.julialang.org/t/cant-install-polars-and-duckdb-on-windows-11/122688>\
**Category:** New to Julia\
**Tags:** package\
**Created:** [November 15, 2024, 4:35pm UTC](https://discourse.julialang.org/t/cant-install-polars-and-duckdb-on-windows-11/122688 "2024-11-15T16:35:59Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![eldee](https://avatars.discourse-cdn.com/v4/letter/e/b5a626/32.png) [@eldee](https://discourse.julialang.org/u/eldee)\
**Post date:** [November 16, 2024, 3:37pm UTC](https://discourse.julialang.org/t/cant-install-polars-and-duckdb-on-windows-11/122688/6 "2024-11-16T15:37:52Z")

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Glad I could help.

> [@pk1](#):
>
> First question is, how were you able to find this answer? In other words, what should I have done to find the solution myself.

Well, Google (or your favourite seach engine) and the Julia Discourse are your friends 🙂 . When I got the error message that Polars could not be found (in the registry), I just googled to get to the github page. Most of the time you would find installation instructions, especially if it’s not just `add <package>`. In the absence of this I checked the Issues, where there indeed was one about registration. Now, I remembered that you could directly install packages from github, but if you wouldn’t, the first Google result for “Julia install package from github” is

> <https://stackoverflow.com/questions/65914480/julia-adding-package-from-github>

which is helpful.

For DuckDB I just searched for something along the lines of “precompile DuckDB” on the Julia Discourse, resulting in the topic I linked to. Again, I was already aware of the Pkg syntax to install a specific version, but that’s a quick Google search away. If I remember correctly

```julia-repl
(@v1.11) pkg> add DuckDB@1.0

```

didn’t work, as it would still install a newer version of the \_jll file, as evidenced by the output in the REPL, so I also forced the version here.

> [@pk1](#):
>
> The second question is, can you recommend any book(s), youtube video(s), or sites that offer good introductions to julia targeting already experienced developers (python, Rust, R)? There are a couple of good videos on youtube, but from simple data scientists that are not so good for my case.

I think it would be best to create a new topic. Well, first look around a bit on the Discourse to see if no similar question has been asked in the past. If not, I think posting under #New to Julia is fine.

> [@pk1](#):
>
> The error on windows is:

I’m haven’t encountered this error before, but you could try the solution proposed here:

> [@How to fix SSL cert issues in Pkg](https://discourse.julialang.org/t/how-to-fix-ssl-cert-issues-in-pkg/115495/3):
>
> I struggled with this for a while, and found that removing environment variables: SSL\_CERT\_FILE JULIA\_SSL\_CA\_ROOTS\_PATH made things work. At the windows powershell prompt, these can be removed manually (and temporarily, for testing) with: Remove-Item Env:SSL\_CERT\_FILE Remove-Item Env:JULIA\_SSL\_CA\_ROOTS\_PATH If you find this works, you can then remove them from your personal environment variables.

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