radeco | radare2-based decompiler and symbol executor | Reverse Engineering library

I have spent the past several hours attempting to install a decompiler with no success. Since I've recently been using radare2 as a disassembler, I figured using the associated decompiler package would work well. After finding out that radeco and radeco-lib aren't currently stable enough to build, I used their package manager r2pm to finally install the r2snow BASH script in ~/.local/share/radare2/prefix/bin.

But now I cannot figure out how to run it to decompile a binary! The error message I receive is: "Usage: r2 -i '.!r2snow'". I know that r2 is shorthand for radare2, and the -i flag is to pass a script file to run, but I've tried passing it the r2snow BASH script in multiple ways with no success.

Does anyone with experience using this particular decompiler know how to properly invoke it? Normally I could figure this out myself, but the lack of proper documentation has proved too difficult.

I kid you not, every time you invoke the program improperly, it taunts you. Most recently: "Usage: r2 -i '.!r2snow'" -- This should be documented, since it's not that obvious. Maybe I should try a different decompiler altogether. Are there any free decompilers out there which are easier to set up?