Should I be able to run `gleam build` succesfully when downloading an exercise?

Programming Gleam
1

When I download an exercise using exercism download --exercise=two-fer --track=gleam and then run gleam build in the directory it downloaded to I get the following compiler error:

PS C:\Users\aage\Exercism\gleam\two-fer> gleam build
Downloading packages
 Downloaded 3 packages in 0.52s
  Compiling gleam_stdlib
error: Syntax error
    ┌─ build\packages\gleam_stdlib\src\gleam\dynamic.gleam:332:22
    │
332 │     use inner_result <- result.then(decode_result(value))
    │                      ^ This operator has no value on its right side.

Hint: Remove it or put a value after it.

Am I doing something wrong?

  • Running on VSCode in Windows 10
  • This is the output of gleam --version: gleam 0.22.1
2

Hey aage,

This error shouldn’t happen. The exercise requires a stdlib version of at least 0.26.0. The manifest.toml locks in 0.27.0. The manifest acts like a .lockfile in Node/JavaScript. The error you’re getting is caused by the older version of Gleam failing to build the newer standard library.
See Installing Gleam – Gleam for installation information. I personally like using the asdf version manager, on Windows it might be easier to use the prebuilt binary.

Hope that helps. :)

Edit: Was confused in my first response, thank you to lpil for clearing things up.

3

Thank you for your response!

I tried running choco upgrade gleam but that doesn’t update anything; “gleam v0.22.1 is the latest version available based on your source(s).”

I’ll look into the other options you mentioned!

4

Many great success!

I uninstalled via chocolatey and then added the prebuild .exe to my path on Windows.

Thank you!

5

The latest version of Gleam is in review on chocolatey because it got flagged by one antivirus vendor, should hopefully be sorted out soon: