diff --git a/shell.nix b/shell.nix
index 76eb327..8bb6391 100644
--- a/shell.nix
+++ b/shell.nix
@@ -4,11 +4,60 @@ let
 
   inherit (nixpkgs) pkgs;
 
+  postgresql-simple-migration = with haskellPackages; callPackage(
+    { mkDerivation, base, bytestring, cryptohash
+    , directory, hspec, lib, postgresql-simple, text, time
+    }:
+    mkDerivation {
+      pname = "postgresql-simple-migration";
+      version = "0.1.15.0";
+      sha256 = "6d37425a805c6268f323e63d091020622d17b88b37c8963da0b7d26ea787d648";
+      isLibrary = true;
+      isExecutable = true;
+      libraryHaskellDepends = [
+        base base64-bytestring bytestring cryptohash directory
+        postgresql-simple time
+      ];
+      executableHaskellDepends = [
+        base base64-bytestring bytestring cryptohash directory
+        postgresql-simple text time
+      ];
+      testHaskellDepends = [ base bytestring hspec postgresql-simple ];
+      homepage = "https://github.com/ameingast/postgresql-simple-migration";
+      description = "PostgreSQL Schema Migrations";
+      doCheck = false;
+      license = lib.licenses.bsd3;
+    })
+  {};
+
+  base64-bytestring = with haskellPackages; callPackage(
+    { mkDerivation, base, bytestring, containers, criterion, deepseq
+    , HUnit, lib, QuickCheck, split, test-framework
+    , test-framework-hunit, test-framework-quickcheck2
+    }:
+    mkDerivation {
+      pname = "base64-bytestring";
+      version = "1.0.0.3";
+      sha256 = "ef159d60ec14c0a3f3e26bab5c9fd7634d5e1b983c6a64f0b0c3261efe008fc7";
+      libraryHaskellDepends = [ base bytestring ];
+      testHaskellDepends = [
+        base bytestring containers HUnit QuickCheck split test-framework
+        test-framework-hunit test-framework-quickcheck2
+      ];
+      benchmarkHaskellDepends = [
+        base bytestring containers criterion deepseq
+      ];
+      homepage = "https://github.com/haskell/base64-bytestring";
+      description = "Fast base64 encoding and decoding for ByteStrings";
+      license = lib.licenses.bsd3;
+    })
+  {};
+
   f = { mkDerivation, aeson, base, base16-bytestring
-      , base64-bytestring, bytestring, case-insensitive, clock
+      , bytestring, case-insensitive, clock
       , containers, extra, HsYAML, http-api-data, http-types, iproute
       , mtl, network, opaleye, optparse-applicative, postgresql-simple
-      , postgresql-simple-migration, product-profunctors, profunctors
+      , product-profunctors, profunctors
       , pureMD5, random-bytestring, servant, servant-rawm, servant-server
       , stdenv, stm, text, time, wai, wai-logger, wai-middleware-throttle
       , warp