How to download and setup koka
Open terminal and run command
                                            git clone https://github.com/koka-lang/koka.git
                                        
                                        git clone is used to create a copy or clone of koka repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with koka https://github.com/koka-lang/koka/archive/master.zip
Or simply clone koka with SSH
                                            [email protected]:koka-lang/koka.git                                    
                                    If you have some problems with koka
You may open issue on koka support forum (system) here: https://github.com/koka-lang/koka/issuesSimilar to koka repositories
Here you may see koka alternatives and analogs
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