diff --git a/flake.nix b/flake.nix
index 817baa1..c003d33 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,32 +6,49 @@
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = inputs :
+  outputs = inputs:
     inputs.flake-utils.lib.eachDefaultSystem (system:
-     let pkgs = inputs.nixpkgs.legacyPackages.${system};
-         haskell = pkgs.haskell.packages.ghc96;
-     in
-  {
-    packages = {
-      default = haskell.callCabal2nix "zureg" ./. {};
-    };
-    devShells = {
-      default = pkgs.mkShell {
-        buildInputs = [
-          pkgs.zlib.dev
-        ];
-        packages = [
-          pkgs.cabal-install
-          pkgs.entr
-          pkgs.jq
-          pkgs.postgresql
-          pkgs.awscli2
-          haskell.stylish-haskell
-          (haskell.ghc.withPackages (p:
-            inputs.self.packages.${system}.default.buildInputs ++
-            [p.postgresql-simple]))
-        ];
-      };
-    };
-  });
+      let
+        pkgs = inputs.nixpkgs.legacyPackages.${system};
+        haskell = pkgs.haskell.packages.ghc96;
+      in {
+        packages = { default = haskell.callCabal2nix "zureg" ./. { }; };
+        devShells = {
+          default = let
+            postgres = {
+              db = "zureg";
+              password = "hunter2";
+              port = "5433";
+            };
+          in pkgs.mkShell {
+            buildInputs = [ pkgs.zlib.dev ];
+            packages = [
+              pkgs.cabal-install
+              pkgs.entr
+              pkgs.jq
+              pkgs.docker
+              pkgs.postgresql
+              pkgs.awscli2
+              haskell.stylish-haskell
+              (haskell.ghc.withPackages (p:
+                inputs.self.packages.${system}.default.buildInputs
+                ++ [ p.postgresql-simple ]))
+            ];
+
+            shellHook = ''
+              docker container port ${postgres.db}-postgres || docker run \
+                --rm \
+                --name ${postgres.db}-postgres \
+                -e POSTGRES_DB=${postgres.db} \
+                -e POSTGRES_PASSWORD=${postgres.password} \
+                -p ${postgres.port}:5432 \
+                -d postgres
+            '';
+
+            ZUREG_DB =
+              "postgresql://postgres:${postgres.password}@localhost:${postgres.port}/${postgres.db}";
+          };
+        };
+        formatter = pkgs.nixfmt;
+      });
 }
diff --git a/lib/Zureg/Main/Migrations.hs b/lib/Zureg/Database/Migrations.hs
similarity index 84%
rename from lib/Zureg/Main/Migrations.hs
rename to lib/Zureg/Database/Migrations.hs
index 63896f7..630a3de 100644
--- a/lib/Zureg/Main/Migrations.hs
+++ b/lib/Zureg/Database/Migrations.hs
@@ -1,8 +1,11 @@
 {-# LANGUAGE OverloadedStrings #-}
-module Zureg.Main.Migrations where
+module Zureg.Database.Migrations
+    ( migrate
+    ) where
 
 import qualified Data.ByteString.Char8      as BS8
 import           Data.Char                  (isDigit)
+import           Data.Foldable              (for_)
 import           Data.List                  (sortOn)
 import           Data.String                (fromString)
 import           Data.Traversable           (for)
@@ -24,18 +27,18 @@ listMigrations = sortOn fst <$> do
   where
     dir = "lib/Zureg/Database/Migrations"
 
-main :: IO ()
-main = do
+migrate :: IO ()
+migrate = do
     pgstring <- lookupEnv "ZUREG_DB" >>= maybe (fail "ZUREG_DB not set") pure
     conn <- Pg.connectPostgreSQL $ BS8.pack pgstring
-    Pg.execute_ conn "\
+    _ <- Pg.execute_ conn "\
         \CREATE TABLE IF NOT EXISTS migrations (\n\
         \    version INT NOT NULL PRIMARY KEY,\n\
         \    path TEXT NOT NULL\n\
         \)"
 
     migrations <- listMigrations
-    for migrations $ \(version, path) -> Pg.withTransaction conn $ do
+    for_ migrations $ \(version, path) -> Pg.withTransaction conn $ do
         rows <- Pg.query conn
             "SELECT version FROM migrations WHERE version = ?"
             (Pg.Only version) :: IO [Pg.Only Int]
@@ -45,8 +48,8 @@ main = do
             [] -> do
                 IO.hPutStrLn IO.stderr $ "Running migration: " ++ path
                 contents <- readFile path
-                Pg.execute_ conn $ fromString contents
-                Pg.execute conn
+                _ <- Pg.execute_ conn $ fromString contents
+                _ <- Pg.execute conn
                     "INSERT INTO migrations (version, path) VALUES (?, ?)"
                     (version, path)
                 pure ()
diff --git a/lib/Zureg/Main/Migrate.hs b/lib/Zureg/Main/Migrate.hs
new file mode 100644
index 0000000..8824176
--- /dev/null
+++ b/lib/Zureg/Main/Migrate.hs
@@ -0,0 +1,7 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Zureg.Main.Migrate (main) where
+
+import           Zureg.Database.Migrations (migrate)
+
+main :: IO ()
+main = migrate
diff --git a/zureg.cabal b/zureg.cabal
index 579f494..c7581e2 100644
--- a/zureg.cabal
+++ b/zureg.cabal
@@ -31,6 +31,7 @@ Library
 
   Exposed-modules:
     Zureg.Database
+    Zureg.Database.Migrations
     Zureg.Form
     Zureg.Hackathon
     Zureg.Hackathon.Interface
@@ -64,6 +65,7 @@ Library
     Zureg.Main.Export
     Zureg.Main.Janitor
     Zureg.Main.PopWaitlist
+    Zureg.Main.Migrate
     Zureg.Main.Web
     Zureg.Model
     Zureg.Model.Csv