The alpine-sdk is a metapackage that pulls in the most essential packages used to build new packages. Also install and configure a way to elevate privileges, such as sudo or [doas](../../cli/system/doas.md), and an editor, such as vi, nano, [micro](../../cli/micro.md).
For you build you need a [APKBUILD](APKBUILD.md) file and `abuild` as a packaging tool.
Usage:
-`abuild checksum`: updates the checksums for source files.
-`abuild -r`: builds the package.
### Building in a chroot
Install package`abuild-rootbld`:
```shell
apk add abuild-rootbld
```
You may now build your packages from source in an unprivileged sandbox based onbubblewrapwith the command:
```shell
abuild rootbld
```
If the build process needs network access there has to bet set the**net**option in[APKBUILD](APKBUILD.md).
## Bumping a package version
The tool`abump`is a utility to bump pkgver in [APKBUILD](APKBUILD.md) files if the package gets an update to a newer upstream release.`abump`will update the package's`pkgver`, rebuild it and create a new commit with the resulting changes.
```shell
abump [-hR]
```
**abump options**
- **-h**Show this help
- **-R**Run abuild with -R for recursive building
- **-k**Keep existing packages
## Updating a package release
If you want to bump or reset the pkgrel value of your [APKBUILD](APKBUILD.md) or test your [APKBUILD](APKBUILD.md) files,apkgrelcan assist you.
```shell
apkgrel -a|-h|-s NUM|-t|-z [-f] FILE...
```
**apkgrel options**
- **-a**Add 1 to current pkgrel
- **-f**Force, even if given files are not in proper format
- **-h**Show this help
- **-s**Set pkgrel to NUM
- **-t**Only verify that files are in proper format
