Mod works in games/subgame/mods but not in minetest/mods

[Merlin]

I installed the mods watershed and canyon into the mods folder inside the one of my subgames.
There they both worked like a charm, this is not a naming convention problem (I think...?).

Then, I wanted to be able to disable and endable them separately, so I put them in the "global" mods folder(the one that works for all subgames) inside the minetest folder.
But minetest did not recognize the mods.
No error or anything, they just don't appear. neither in "Mods" or in the world configuration menu.

I made a change in the watershed mod so I thought that might be the cause.
I deleted both mods, then unpacked the original .zip files again, renamed the mod folders and put them into the "global" mods folder.
And again, minetest does not recognize them, just like mentioned before.

Can anyone help me out on this?

Btw., I am using hand-compiled 0.4.11-dev .

[Merlin]

Okey, I think I found the cause myself:

I have a minetest installed by the package manager (only for playing) running next to the compiled one (which I use for modding) .
I thought they are running independly from each other.
Fun fact: They do not.
They both share ~/.minetest and probably the mod directory in ~/.minetest is preferred over the one in the directory of the hand-compiled minetest, causing the mods to be invisible to both minetests.