[BUG] pacman doesn't let not to remove a build dependency

[jyno]

Building invoiceninja on RPI3, and deciding to keep dependency unzip. See log below:

$this->bbcode_second_pass_quote('', '
')==> Finished making: invoiceninja 5.3.46-1 (Thu 24 Feb 2022 05:31:46 PM IST)
==> Removing installed dependencies...
[sudo] password for alarm:
checking dependencies...
:: mc optionally requires unzip: open zip archives
:: nnn optionally requires unzip: for zip archive format

Packages (1) unzip-6.0-18

Total Removed Size: 0.28 MiB

:: Do you want to remove these packages? [Y/n] n
==> WARNING: Failed to remove installed dependencies.
==> Removing installed dependencies...
checking dependencies...
:: mc optionally requires unzip: open zip archives
:: nnn optionally requires unzip: for zip archive format

Packages (1) unzip-6.0-18

Total Removed Size: 0.28 MiB

:: Do you want to remove these packages? [Y/n]
:: Processing package changes...
(1/1) removing unzip [################] 100%
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
[alarm@alarmpi pkgbuild]$ sh build.sh invoiceninja