After installing decktape I got following error:

decktape -h
module.js:538
    throw err;
    ^

Error: Cannot find module '/usr/lib/node_modules/decktape/node_modules/hummus/binding/hummus.node'
    at Function.Module._resolveFilename (module.js:536:15)
    at Function.Module._load (module.js:466:25)
    at Module.require (module.js:579:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/usr/lib/node_modules/decktape/node_modules/hummus/hummus.js:5:31)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)

[ottlukas]

That solved the issue:

 /usr/lib/node_modules/decktape/node_modules/hummus $ sudo mkdir binding
/usr/lib/node_modules/decktape/node_modules/hummus $ sudo cp /usr/lib/node_modules/hummus/binding/hummus.node /usr/lib/node_modules/decktape/node_modules/hummus/binding/hummus.node

Result:

 $ decktape -h

Usage: decktape [options] [command] <url> <filename>
       decktape version

command      one of: automatic, bespoke, csss, deck, dzslides, flowtime, generic, impress, remark, reveal, rise, shower-1.x, shower-2.x, slidy, webslides
url          URL of the slides deck
filename     Filename of the output PDF file

Options:
   -s <size>, --size <size>        Size of the slides deck viewport: <width>x<height>  (ex. 1280x720)
   -p <ms>, --pause <ms>           Duration in milliseconds before each slide is exported  [1000]
   --load-pause <ms>               Duration in milliseconds between the page has loaded and starting to export slides  [0]
   --screenshots                   Capture each slide as an image  [false]
   --screenshots-directory <dir>   Screenshots output directory  [screenshots]
   --screenshots-size <size>       Screenshots resolution, can be repeated
   --screenshots-format <format>   Screenshots image format, one of [jpg, png]  [png]
   --slides <range>                Range of slides to be exported, a combination of slide indexes and ranges (e.g. '1-3,5,8')

Defaults to the automatic command.
Iterates over the available plugins, picks the compatible one for presentation at the
specified <url> and uses it to export and write the PDF into the specified <filename>.

Thank you! 😃 👍

[7Moses]

The above did not work for me or I could not figure it out, but this did:

$ cd /usr/local/lib/node_modules/decktape/node_modules/
$ npm rebuild hummus --update-binary  

(Learnt here: https://stackoverflow.com/questions/45761864/nodejs-how-to-fix-different-node-module-version/45762265#45762265)

… back in production