npm package's binary accessible until I add flags - macos

Question

I'm on a mac am trying to install elasticdump. It is also worth noting that I am using zsh, but am getting the equivalent error described below when switching over to bash.
I just re-installed npm from scratch and am now using 6.12.0. After this, I ran npm install elasticdump -g which appears to have worked just fine.
$ which elasticdump
/usr/local/bin/elasticdump
It appears I am still having the same issue I was having before I tried re-installing everything.
I can run elasticdump directly with no issues. It tells me I need an input and an output as I would expect.
$ elasticdump
Sat, 09 Nov 2019 04:52:40 GMT | Error Emitted => {"errors":["`input` is a required input","`output` is a required input"]}
I can even run it with --help.
$ elasticdump --help
elasticdump: Import and export tools for elasticsearch
version: 6.15.7
...
But when I add an input and output, things fall apart!
$ elasticdump \
--input /Users/slant/Desktop/data.json \
--output http://localhost:9200/companies \
--type data
zsh: command not found: elasticdump
And in bash:
$ elasticdump \
> --input /Users/slant/Desktop/data.json \
> --output http://localhost:9200/companies \
> --type data
bash: elasticdump : command not found
I'm completely baffled as to how adding specific flags causes it to become completely inaccessible! Any help at all would be greatly appreciated.
Edit: In case anyone requests this:
$ ls -la /usr/local/bin/elasticdump
lrwxr-xr-x 1 slant admin 47 Oct 1 20:42 /usr/local/bin/elasticdump -> ../lib/node_modules/elasticdump/bin/elasticdump
Accessing the binary through the file directly behaves exactly the same way as using just elasticdump by itself.
Updated, for clarification.
/usr/local/lib/node_modules/elasticdump/bin/elasticdump
Sat, 09 Nov 2019 18:40:56 GMT | Error Emitted => {"errors":["`input` is a required input","`output` is a required input"]}
$ /usr/local/lib/node_modules/elasticdump/bin/elasticdump \
--input /Users/ryan/Desktop/data.json \
--output http://localhost:9200/companies \
--type data
zsh: no such file or directory: /usr/local/lib/node_modules/elasticdump/bin/elasticdump