If you're not going to use in Command Line, or AppCode, (Only in Xcode) you can try installation with
git clone https://github.com/DyCI/dyci-main.git
cd dyci-main/Install/
./install.sh -s
More about this here : https://github.com/DyCI/dyci-main/releases/tag/1.6

It's better to use Xcode only variant, since this one is not stable enough
To install dyci, you just need to run install.sh from Install directory
cd /tmp
git clone https://github.com/DyCI/dyci-main.git
cd dyci-main/Install/
./install.sh

Hopefuly, you'll see this log:

== Backing up clang : Done.
== Faking up clang : Done.
== Preparing dyci-recompile : Done.
== Copying scripts : Done.
== AppCode found. Installing DYCI as AppCode external tool : Done.
== Installing Xcode DCI plugin : Done.
Now you can use DCI from the Xcode :P (^X)

DCI was successfully installed!

If so, then you ready to use dyci in your project. Restart Xcode or AppCode, and start using it