diff --git a/.gitignore b/.gitignore
index fc6511342..a0fc05f50 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,4 @@ tags
 TAGS
 .stack-work/
 dist-newstyle/
+result
diff --git a/default.nix b/default.nix
new file mode 100644
index 000000000..2905a0df6
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,43 @@
+# To pin a new Haskell LTS in nixpkgs, get its commit sha (e.g. 7aa6d2c808b14aa04dc93c2ca64344c9eee0876a)
+# and run:
+# nix-prefetch-git \
+#   --url https://github.com/NixOS/nixpkgs-channels \
+#   --rev 7aa6d2c808b14aa04dc93c2ca64344c9eee0876a \
+# > nixpkgs.json
+
+# To build yi, run:
+# nix build -f default.nix haskellPackages.yi
+
+{ hostPkgs ? import <nixpkgs> {}
+, pinnedVersion ? hostPkgs.lib.importJSON ./nixpkgs.json
+}:
+
+let
+  pkgs = let
+    pinnedPkgs = hostPkgs.fetchFromGitHub {
+      owner = "NixOS";
+      repo = "nixpkgs-channels";
+      inherit (pinnedVersion) rev sha256;
+    }; in import pinnedPkgs {};
+in pkgs // rec {
+  haskellPackages = pkgs.haskellPackages.override {
+    overrides = self: super: rec {
+      yi                       = super.callCabal2nix "yi"                       ./yi {};
+      yi-core                  = super.callCabal2nix "yi-core"                  ./yi-core {};
+      yi-dynamic-configuration = super.callCabal2nix "yi-dynamic-configuration" ./yi-dynamic-configuration {};
+      yi-frontend-pango        = super.callCabal2nix "yi-frontend-pango"        ./yi-frontend-pango {};
+      yi-frontend-vty          = super.callCabal2nix "yi-frontend-vty"          ./yi-frontend-vty {};
+      yi-fuzzy-open            = super.callCabal2nix "yi-fuzzy-open"            ./yi-fuzzy-open {};
+      yi-intero                = super.callCabal2nix "yi-intero"                ./yi-intero {};
+      yi-ireader               = super.callCabal2nix "yi-ireader"               ./yi-ireader {};
+      yi-keymap-cua            = super.callCabal2nix "yi-keymap-cua"            ./yi-keymap-cua {};
+      yi-keymap-emacs          = super.callCabal2nix "yi-keymap-emacs"          ./yi-keymap-emacs {};
+      yi-keymap-vim            = super.callCabal2nix "yi-keymap-vim"            ./yi-keymap-vim {};
+      yi-language              = super.callCabal2nix "yi-language"              ./yi-language {};
+      yi-misc-modes            = super.callCabal2nix "yi-misc-modes"            ./yi-misc-modes {};
+      yi-mode-haskell          = super.callCabal2nix "yi-mode-haskell"          ./yi-mode-haskell {};
+      yi-mode-javascript       = super.callCabal2nix "yi-mode-javascript"       ./yi-mode-javascript {};
+      yi-snippet               = super.callCabal2nix "yi-snippet"               ./yi-snippet {};
+    };
+  };
+}
diff --git a/nixpkgs.json b/nixpkgs.json
new file mode 100644
index 000000000..a8a6f0132
--- /dev/null
+++ b/nixpkgs.json
@@ -0,0 +1,7 @@
+{
+  "url": "https://github.com/NixOS/nixpkgs-channels",
+  "rev": "7aa6d2c808b14aa04dc93c2ca64344c9eee0876a",
+  "date": "2018-06-07T15:21:57+02:00",
+  "sha256": "1x1aiph1d0xfwnfa61wqvjpgdga87h82dp3rwh14lj489wi133y4",
+  "fetchSubmodules": false
+}