OK, after spending a few hours on it, i think i figured out a fix: 1. Currently, internal creation of

DATABASE_URL

value from the env for the prisma build step seems to be broken. Notice above, where the error message says ‘Error: P1001: Can’t reach database server at `database`:`5432`’. (The additional backtick marks seems suspicious.) What DOES work is passing in this value via the command line, like:

DOCKER_BUILDKIT=0 docker compose build --build-arg DATABASE_URL=<postgresql://postgres:postgres@host:5432/database> calcom

. (I tested setting the URL component values in the env to the same values as passed in via the command line like above: The env method failed and the command line method worked.) 2. The LAN IP address of the

database

container needs to be used at the command line, not the generic

database:5432

addressing. That is, before calling the above command, the user needs to

docker-compose up database --detach

,

docker exec -it database bash

, inside the

database

container get the LAN IP address via

hostname -I

, and then use that value as the appropriate URL host address within the command above. Example:

DOCKER_BUILDKIT=0 docker compose build --build-arg DATABASE_URL=<postgresql://postgres:postgres@172.24.0.2:5432/database> calcom

as mentioned in GH, there is something going on here. you really shouldn't need to do all of that. Can you post info on what docker runtime you're using? (for example I use Rancher Desktop, which uses the runtime moby under the hood)

any idea how i find this out? i just used

brew install docker

on macOS and live on the command line.