Let $MINIZINC_DIR denote the directory containing the MiniZinc distribution.
To ensure the SICStus tools can find the MiniZinc tools they
need, make sure that $MINIZINC_DIR/bin is included in the
environment variable PATH.
To tell the MiniZinc command-line tool minizinc to
use SICStus, pass it the argument --solver with the path to
the solver configuration file library/zinc/sicstus.msc in the
SICStus installation. E.g. on Linux/macOS:
$ minizinc --solver '/usr/local/sicstus4.9.0/lib/sicstus-4.9.0/library/zinc/sicstus.msc' …
On Windows:
> minizinc --solver "C:\Program Files\SICStus Prolog VC16 4.9.0\library\zinc\sicstus.msc' …
Alternatively, you can add the library/zinc/ folder to the “Extra solver search paths” setting in the MiniZincIDE GUI application preferences, and then just use the name ‘sicstus’ as the --solver argument. This is what is used in most of the examples below. For example
minizinc --solver sicstus …