# stdlib_module_unknown

> A disko: import names a module the host does not provide.

A disko: import names a module the host does not provide.

| | |
| --- | --- |
| Kind | Build or validation problem |
| Reported by | Archive and source validation |
| `disko` exit code | 1 (problems) |

A `disko:` import names a module the host does not provide. The built-in
modules are `disko:math` and `disko:geometry`.

## Wrong

```ts title="src/main.ts"
import { vec } from "disko:vector";
```

## Right

```ts title="src/main.ts"
import { vec } from "disko:math";
```

## See also

- [Project structure & imports](/games/project-structure)
- [`specifier_invalid`](/errors/specifier_invalid)