Error: spawn mjml ENOENT

[silas229]

I got this error:

["mjml","-r","template.mjml","-o","template.html"] Error: spawn mjml ENOENT [Finished in 0.06 seconds, with code -4058]

My config:

"atom-shell-commands":
    commands: [
      {
        name: "mjml"
        command: "mjml"
        arguments: [
          "-r"
          "{FileName}"
          "-o"
          "{FileNameNoExt}.html"
        ]
        options:
          cwd: "{FileDir}"
          keymap: 'ctrl-2'
          save: true
      }
    ]