diff --git a/flake.lock b/flake.lock
index 072f102..54802be 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,8 +1,93 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1606424373,
+        "narHash": "sha256-oq8d4//CJOrVj+EcOaSXvMebvuTkmBJuT5tzlfewUnQ=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "99f1c2157fba4bfe6211a321fd0ee43199025dbf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1617631617,
+        "narHash": "sha256-PARRCz55qN3gy07VJZIlFeOX420d0nGF0RzGI/9hVlw=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b2c27d1a81b0dc266270fa8aeecebbd1807fc610",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1614513358,
+        "narHash": "sha256-LakhOx3S1dRjnh0b5Dg3mbZyH0ToC9I8Y2wKSkBaTzU=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5466c5bbece17adaab2d82fae80b46e807611bf3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1611672876,
+        "narHash": "sha256-qHu3uZ/o9jBHiA3MEKHJ06k7w4heOhA+4HCSIvflRxo=",
+        "owner": "hercules-ci",
+        "repo": "gitignore",
+        "rev": "211907489e9f198594c0eb0ca9256a1949c9d412",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore",
+        "type": "github"
+      }
+    },
+    "himalaya": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "gitignore": "gitignore",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      },
+      "locked": {
+        "lastModified": 1617828522,
+        "narHash": "sha256-8P2fHNoslQgC5NJFgoEAFj9sgud8okbzFkqOD0yBdTs=",
+        "owner": "srid",
+        "repo": "himalaya",
+        "rev": "d706dd333397c672331f9077e07df09f5b924ba9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "srid",
+        "ref": "nixify",
+        "repo": "himalaya",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs_3"
       },
       "locked": {
         "lastModified": 1617625716,
@@ -20,11 +105,42 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1617737732,
-        "narHash": "sha256-ZwXL2oC/x2YSYkDdnbyFiSD8v1D6uoJSUA3FX0o8BZ4=",
+        "lastModified": 1617636226,
+        "narHash": "sha256-iZhBWrOR2DoDs1C+0FlnM9AQLMol/qoGQ+d+S43CKJM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3d1a7716d7f1fccbd7d30ab3b2ed3db831f43bde",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1617325113,
+        "narHash": "sha256-GksR0nvGxfZ79T91UUtWjjccxazv6Yh/MvEJ82v1Xmw=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "54c1e44240d8a527a8f4892608c4bce5440c3ecb",
+        "type": "github"
+      },
+      "original": {
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f7ff87470148462b06ff5516ae9c4439f9519935",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1617636226,
+        "narHash": "sha256-iZhBWrOR2DoDs1C+0FlnM9AQLMol/qoGQ+d+S43CKJM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3d1a7716d7f1fccbd7d30ab3b2ed3db831f43bde",
         "type": "github"
       },
       "original": {
@@ -32,7 +148,7 @@
         "type": "indirect"
       }
     },
-    "nixpkgs_2": {
+    "nixpkgs_4": {
       "locked": {
         "lastModified": 1617636226,
         "narHash": "sha256-iZhBWrOR2DoDs1C+0FlnM9AQLMol/qoGQ+d+S43CKJM=",
@@ -50,8 +166,28 @@
     },
     "root": {
       "inputs": {
+        "himalaya": "himalaya",
         "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs_4"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
         "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1617762447,
+        "narHash": "sha256-bv1e5VRZnSswnVtBH2Nc1omInZSRgASsS8xO+Fg9whc=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "08263e3fa955acbcb6612c00d920d45e517b242d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index cb05f08..3f458dd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,16 +1,18 @@
 {
-  description = "NixOS configuration";
+  description = "Srid's NixOS configuration";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     home-manager.url = "github:nix-community/home-manager";
+    himalaya.url = "github:srid/himalaya/nixify";
   };
 
-  outputs = { self, home-manager, nixpkgs }: 
+  outputs = inputs@{ self, home-manager, nixpkgs, ... }: 
     let 
+      system = "x86_64-linux";
       # Make configuration for any computer I use in my home office.
       mkHomeMachine = configurationNix: nixpkgs.lib.nixosSystem {
-        system = "x86_64-linux";
+        inherit system;
         modules = [
           # System configuration
           configurationNix
@@ -19,6 +21,23 @@
           ./modules/protonmail-bridge.nix
           ./modules/monitor-brightness.nix
 
+          # Packages from flake inputs
+          ({ pkgs, lib, ... }: {
+            environment.systemPackages = 
+              let 
+                # Wrap himalaya to be aware of ProtonMail's bridge cert.
+                himalaya = lib.getAttrFromPath [system] inputs.himalaya.defaultPackage;
+                himalayaWithSslEnv = 
+                  pkgs.writeScriptBin "h" ''
+                    #!${pkgs.stdenv.shell}
+                    export SSL_CERT_FILE=~/.config/protonmail/bridge/cert.pem
+                    exec ${himalaya}/bin/himalaya
+                    '';
+              in [
+                himalayaWithSslEnv
+              ];
+          })
+
           # home-manager configuration
           home-manager.nixosModules.home-manager
           {