Custom Webpack wrapper library not installing dependencies - npm

Question

I wrote a wrapper library for internal use of webpack with all the needed loaders and config stuff pre-done so I only have to install the wrapper library to every project and add the entry configuration.
So far that worked but for my newest, freshly cloned project it doesn't.
I tried deleting the node_modules folder and the package-lock.json file and do a clean npm i but it's still the same.
webpack-cli is installed, but has webpack as peer-dependency and it says it isn't installed. When I add it to the projects' package.json it works, but then trying to npm run build results in several errors that it couldn't find any of the loaders that should have been installed with the library.
project package.json
"scripts": {
"build": "webpack --progress --colors --hide-modules",
"dev": "npm run build --",
"watch": "npm run dev -- --watch",
"prod": "NODE_ENV=production npm run build"
},
"devDependencies": {
"#namespace/lib": "git+ssh://git#internal:js/lib.git"
},
library package.json
"dependencies": {
"#babel/core": "^7.1.2",
"#babel/preset-env": "^7.1.0",
"autoprefixer": "^9.3.1",
"babel-loader": "^8.0.4",
"copy-webpack-plugin": "^4.5.4",
"css-loader": "^1.0.0",
"extract-text-webpack-plugin": "^4.0.0-beta.0",
"file-loader": "^2.0.0",
"image-webpack-loader": "^4.4.0",
"lodash": "^4.17.11",
"node-sass": "^4.9.4",
"postcss-loader": "^3.0.0",
"sass-loader": "^7.1.0",
"vue-loader": "^15.4.2",
"vue-style-loader": "^4.1.2",
"vue-template-compiler": "^2.5.17",
"webpack": "^4.23.1",
"webpack-cli": "^3.1.2"
},
"devDependencies": {
"eslint": "^5.8.0",
"standard": "^12.0.1"
}

Answer 1

I deleted the
"#namespace/lib": "git+ssh://git#internal:js/lib.git"
line from the projects' package.json file and did a
npm i -D git+ssh://git#internal:js/lib.git
and now it installed all the libraries' dependencies.
Before that I just ran npm i from the newly cloned project with the existing lines in the package.json. I don't understand why that would make a difference, but it seems it did!
//EDIT:
Another thing that worked:
git reset --hard
rm package-lock.json
rm -rf node_modules # deleting already installed modules from the previous tries
npm i
So from a fresh git clone-perspective it's just deleting the lock-file and then installing again. But without a pre-existing node_modules folder.