nix: rip out the rest of the flake

nix/devShells/default.nix

@@ -1,44 +0,0 @@
-{systems, ...} @ inputs: let
-  inherit (inputs.nixpkgs) lib;
-
-  devShellOf = system: let
-    pkgs = inputs.nixpkgs.legacyPackages.${system};
-  in
-    {
-      default = let
-        pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
-          src = ./.;
-          hooks = {
-            # nix
-            alejandra.enable = true;
-            statix.enable = true;
-            deadnix.enable = true;
-
-            # lua
-            stylua.enable = true;
-
-            # toml
-            taplo.enable = true;
-          };
-        };
-      in
-        inputs.nixpkgs.legacyPackages.${system}.mkShell {
-          inherit (pre-commit-check) shellHook;
-          buildInputs =
-            pre-commit-check.enabledPackages
-            ++ [
-              # xmonad in configuration doesn't export the instance of ghc to PATH
-              (pkgs.haskellPackages.ghcWithPackages (self: [
-                self.xmonad-contrib
-                self.xmonad-extras
-              ]))
-              pkgs.haskell-language-server
-              pkgs.cabal-install # for project discovery
-            ];
-        };
-    }
-    // import ./of-repos.nix {inherit pkgs;}
-    // import ./of-languages.nix {inherit pkgs;};
-in {
-  devShells = lib.genAttrs systems devShellOf;
-}

nix/devShells/of-languages.nix

@@ -1,75 +0,0 @@
-{pkgs, ...}: let
-  jdk = pkgs.jdk17.override {enableJavaFX = true;};
-in {
-  mkShell = pkgs.mkShell {
-    name = "mkShell";
-    packages = [];
-  };
-
-  rust = pkgs.mkShell {
-    name = "Rust";
-    packages = [
-      pkgs.cargo
-      pkgs.rustc
-      pkgs.rustfmt
-    ];
-  };
-
-  java = pkgs.mkShell {
-    name = "Java";
-    packages = [
-      jdk
-      pkgs.maven
-    ];
-    JAVA_HOME = "${pkgs.jdk17.home}";
-  };
-
-  scala = pkgs.mkShell {
-    name = "Scala";
-    packages = [
-      jdk
-      (pkgs.sbt.override {jre = jdk;})
-      (pkgs.scala.override {jre = jdk;})
-      (pkgs.metals.override {jre = jdk;})
-      (pkgs.ammonite.override {jre = jdk;})
-    ];
-    JAVA_HOME = "${pkgs.jdk17.home}";
-  };
-
-  typescript = pkgs.mkShell {
-    name = "Typescript";
-    packages = [
-      # typescript
-      pkgs.typescript
-      pkgs.nodejs_20
-      pkgs.vscode-langservers-extracted # HTML/CSS/JSON/ESLint
-      pkgs.nodePackages."@angular/cli" # module WE
-    ];
-  };
-
-  golang = pkgs.mkShell {
-    name = "Golang";
-    packages = [
-      pkgs.go
-      pkgs.golangci-lint
-      pkgs.gofumpt
-    ];
-  };
-
-  haskell = pkgs.mkShell {
-    name = "Haskell";
-    packages = [
-      pkgs.ghc
-      pkgs.cabal-install
-      pkgs.haskell-language-server
-      pkgs.zlib
-    ];
-  };
-
-  python = pkgs.mkShell {
-    name = "Python";
-    packages = [
-      pkgs.python3
-    ];
-  };
-}

nix/devShells/of-repos.nix

@@ -1,55 +0,0 @@
-{pkgs, ...}: {
-  coreutils = pkgs.mkShellNoCC {
-    name = "coreutils";
-    packages = [
-      pkgs.clang-tools
-
-      pkgs.gcc12Stdenv
-
-      pkgs.autoconf
-      pkgs.automake
-      pkgs.bison
-      pkgs.gettext
-      pkgs.git
-      pkgs.gperf
-      pkgs.gzip
-      pkgs.help2man
-      pkgs.m4
-      pkgs.gnumake
-      pkgs.perl
-      pkgs.gnutar
-      pkgs.texinfo
-      pkgs.wget
-      pkgs.xz
-    ];
-  };
-
-  postgres = pkgs.mkShell {
-    name = "postgres";
-    packages = [
-      pkgs.clang-tools
-
-      # adapted from nixpkgs
-      pkgs.glibc
-      pkgs.zlib
-      pkgs.readline
-      pkgs.openssl
-      pkgs.icu
-      pkgs.lz4
-      pkgs.zstd
-      pkgs.systemdLibs
-      pkgs.libuuid
-      pkgs.pkg-config
-      pkgs.libxml2
-      pkgs.tzdata
-      pkgs.libkrb5
-      pkgs.linux-pam
-      pkgs.bison
-      pkgs.flex
-      pkgs.perl
-      pkgs.docbook_xml_dtd_45
-      pkgs.docbook-xsl-nons
-      pkgs.libxslt
-    ];
-  };
-}