Fresh install issues Ubuntu 18.04

Hey,

I am trying my best to get this up & running, but I am really struggling. Here are few different tries.

1) *Fresh start, nothing installed.*
```
$ git clone https://github.com/bsansouci/reprocessing-example.git
Cloning into 'reprocessing-example'...
remote: Enumerating objects: 209, done.
remote: Total 209 (delta 0), reused 0 (delta 0), pack-reused 209
Receiving objects: 100% (209/209), 484.61 KiB | 1.34 MiB/s, done.
Resolving deltas: 100% (104/104), done.

$ cd reprocessing-example
$ npm install
> sdl2@2.0.5 postinstall /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/sdl2
> node postinstall.js

No pre-built binaries for linux, downloading source
Unzip successful.
Building from source, will take a minute or two.
Cloning into 'reprocessing-example'...
remote: Enumerating objects: 209, done.
remote: Total 209 (delta 0), reused 0 (delta 0), pack-reused 209
Receiving objects: 100% (209/209), 484.61 KiB | 1.34 MiB/s, done.
Resolving deltas: 100% (104/104), done.Looks like SDL2 built successfully.

> bsb-native@4.0.1100 postinstall /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/bsb-native
> node postinstall.js

Unzip successful.
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN reprocessing-example@ No repository field.
npm WARN reprocessing-example@ No license field.

added 11 packages from 8 contributors and audited 15 packages in 51.734s
found 0 vulnerabilities

$ npm run build

> reprocessing-example@ build /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example
> bsb -make-world

File "bsconfig.json", line 1
Error: package bs-platform is not found
It's the basic, required package. If you have it installed globally,
Please run `npm link bs-platform` to make it available
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! reprocessing-example@ build: `bsb -make-world`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the reprocessing-example@ build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /home/cd/.npm/_logs/2019-09-10T17_43_03_339Z-debug.log

$ npm install -g bs-platform
/home/cd/.npm-packages/bin/bsb -> /home/cd/.npm-packages/lib/node_modules/bs-platform/lib/bsb
/home/cd/.npm-packages/bin/bsrefmt -> /home/cd/.npm-packages/lib/node_modules/bs-platform/lib/bsrefmt
/home/cd/.npm-packages/bin/bsc -> /home/cd/.npm-packages/lib/node_modules/bs-platform/lib/bsc

> bs-platform@5.0.6 postinstall /home/cd/.npm-packages/lib/node_modules/bs-platform
> node scripts/install.js

ninja binary is copied from pre-distribution
checkoutput: The OCaml compiler, version BuckleScript 5.0.6 (Using OCaml4.02.3+BS )
Standard library directory: /home/cd/.npm-packages/lib/node_modules/bs-platform/lib/ocaml

Prebuilt compiler works good
[5/5] cp refmt.linux refmt.exe
Cleaning... 0 files.
[2/307] runtime/js.ml -> runtime/js.cmj runtime/js.cmi
Building runtime/js.ml
... (lot of lines)
[307/307] stdlib-402/bigarray.ml -> stdlib-402/bigarray.cmj
Building stdlib-402/bigarray.ml
Build finished
+ bs-platform@5.0.6
updated 1 package in 3.386s

$ npm link bs-platform
/home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/bs-platform -> /home/cd/.npm-packages/lib/node_modules/bs-platform

$ npm run build

> reprocessing-example@ build /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example
> bsb -make-world

[3/3] Building fake_src/sdl_index.cmj
[3/3] Building src/tsdl_new.cmj
[3/3] Building src/tgls_new.cmj
[1/30] Building src/events.mlast
File "/home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/Reasongl/src/events.ml", line 1, characters 18-22:
Error: Conditional expression type mismatch (bool,string)
[2/30] Building src/reasongl.mlast
File "/home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/Reasongl/src/reasongl.ml", line 1, characters 18-22:
Error: Conditional expression type mismatch (bool,string)
[10/30] Building src/web/reasongl_web.mlast
Failure: /home/cd/.npm-packages/lib/node_modules/bs-platform/lib/ninja.exe
Location: /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/Reasongl/lib/bs
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! reprocessing-example@ build: `bsb -make-world`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the reprocessing-example@ build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /home/cd/.npm/_logs/2019-09-10T17_46_02_871Z-debug.log
```
No idea what is wrong and how it can be fixed.

2) *Globally installed bs-platform prior to start*
```
$ git clone https://github.com/bsansouci/reprocessing-example.git && cd reprocessing-example && npm install
...(same output as before)

$ npm run build

> reprocessing-example@ build /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example
> bsb -make-world

bs-platform version mismatch Running bsb 4.0.11 (/home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/bsb-native) vs vendored 5.0.6 (/home/cd/.npm-packages/lib/node_modules/bs-platform)
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! reprocessing-example@ build: `bsb -make-world`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the reprocessing-example@ build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /home/cd/.npm/_logs/2019-09-10T17_48_25_556Z-debug.log
```
Apparently there is a version mismatch, so I have tried to install a lower version of `bs-platform`.

3) `Global installation of bs-platform vs. 4.0.11`

```
$ npm install -g bs-platform@4.0.11
$ npm link bs-platform
$ npm build
$ npm run build

> reprocessing-example@ build /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example
> bsb -make-world

[2/2] Building fake_src/sdl_index.mlast.d
[1/1] Building fake_src/sdl_index.cmj
[2/2] Building src/tsdl_new.mlast.d
[1/1] Building src/tsdl_new.cmj
File "/home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/Tsdl/src/tsdl_new.re", line 187, characters 21-28:
Warning: Unimplemented primitive used:TSDL_GetError

[2/2] Building src/tgls_new.mlast.d
[1/1] Building src/tgls_new.cmj
[1/20] Building src/events.mlast
File "/home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/Reasongl/src/events.ml", line 1, characters 18-22:
Error: Conditional expression type mismatch (bool,string)
[2/20] Building src/reasongl.mlast
File "/home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/Reasongl/src/reasongl.ml", line 1, characters 18-22:
Error: Conditional expression type mismatch (bool,string)
[10/20] Building src/native/reasongl_native.mlast
ninja: error: rebuilding 'build.ninja': subcommand failed
Failure: /home/cd/.npm-packages/lib/node_modules/bs-platform/lib/ninja.exe
Location: /home/cd/Scripts/Tutorials/ReasonReprocessing/reprocessing-example/node_modules/Reasongl/lib/bs
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! reprocessing-example@ build: `bsb -make-world`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the reprocessing-example@ build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /home/cd/.npm/_logs/2019-09-10T17_52_31_742Z-debug.log
```
Some error again.

I would appreciate anything that would point me in the correct direction.

Review bsconfig.json and the installed bs-platform versions first; reproduce the failure with npm install and npm run build. Compare the reported errors in node_modules/Reasongl/src/events.ml and reasongl.ml, along with the Tsdl warning, against the dependency versions shown in the issue. Done means a fresh Ubuntu 18.04 install builds successfully without global-link workarounds.

Written by the indexing model from the issue text.