= The lazy method =
Install [[https://www.archlinux.org/packages/extra/x86_64/postgresql/|postgresql]] and [[https://www.archlinux.org/packages/extra/x86_64/postgresql-old-upgrade/|postgresql-old-upgrade]].
Create `~/.config/akonadi/akonadiserverrc`:
```
[%General]
Driver=QPSQL
[QPSQL]
ServerPath=/opt/pgsql-10/bin/pg_ctl
InitDbPath=/opt/pgsql-10/bin/initdb
```
Start Akonadi: `akonadictl start`.
Stop Akonadi: `akonadictl stop`.
Update `~/.config/akonadi/akonadiserverrc`:
```
[%General]
Driver=QPSQL
[QPSQL]
...
ServerPath=/us/bin/pg_ctl
InitDbPath=/usr/bin/initdb
...
```
Start Akonadi: `akonadictl start`.
The database cluster should get successfully updated.