I chose Zola in the build configurations, left it all default (so zola build for the command and /public for the output folder), and I’ve set the environment variable ZOLA_VERSION to 0.17.2
After cloning my repo from GitHub, the logs say this:
11:44:42.877 Success: Finished cloning repository files
11:44:43.657 Detected the following tools from environment:
11:44:43.658 Executing user command: zola build
11:44:43.668 /bin/sh: 1: zola: not found
11:44:43.669 Failed: Error while executing user command. Exited with error code: 127
11:44:43.676 Failed: build command exited with code: 1
11:44:45.318 Failed: error occurred while running build command
Not sure what other info could be useful, but on my local computer running zola build and zola serve does work.
You need to switch the build system to version one:
Open the project Settings tab and navigate to the Builds & deployments sub-tab. Scroll down to Build system version and click Configure Production build system. Change the build system from version 2 to version 1 so that Zola will be installed.