Setting up developer environments has become vastly more complicated than it was in the past. With language-specific package managers, ad-hoc installation proce

Setting up developer environments has become vastly more complicated than it was in the past. With language-specific package managers, ad-hoc installation processes (along with surreptitious editing of shell config files under the user's nose), variety of operating systems, library versions and instruction sets, trying to get reproducible builds and environments seems close to impossible without some unified tools such as Nix or well-written Dockerfiles. This is even before issues such as resolving dependency conflicts and trying to work with out-of-tree changes to dependencies and patched dependencies.