question on dub and postgresql

[Alaindevos]

On Monday, 5 October 2020 at 08:50:53 UTC, Alaindevos wrote:
> On Monday, 5 October 2020 at 08:47:45 UTC, Alaindevos wrote:
>> On Monday, 5 October 2020 at 08:34:37 UTC, Imperatorn wrote:
>>> On Monday, 5 October 2020 at 08:24:26 UTC, Alaindevos wrote:
>>>> [...]
>>>
>>> Take a look at:
>>> https://code.dlang.org/packages/dpq2
>>> https://code.dlang.org/packages/ddbc
>>
>> Say I want to use dpq2.
>> Do I need to clone the git repository with "git clone ?"
>
> rdmd is as expected unaware of includes and libraries needed.
>
> rdmd --build-only test.d
> test.d(3): Error: module `dpq2` is in file 'dpq2.d' which 
> cannot be read
> import path[0] = .
> import path[1] = /usr/local/include/d
> Failed: ["/usr/local/bin/ldmd2", "-v", "-o-", "test.d", "-I."]

I cloned the git repository with ,running make does nothing. 
There is no makefile.

Dub build spits out,
dub build                                                         
                              (git)-[master]-
Main package must not have target type "sourceLibrary". Cannot 
build.