diff --git a/manifest.dhall b/manifest.dhall
index cb39a3dbf1e14ca42248a1c0be2243b92672c27f..03c5b635175b4dc42adf012bc35bb0a9c4ef34e7 100644
--- a/manifest.dhall
+++ b/manifest.dhall
@@ -384,6 +384,7 @@ in  [ callHackage "Cabal" "3.8.1.0"
     , callHackage "mockery" "0.3.5"
     , callHackage "microlens-aeson" "2.5.0"
     , callHackage "microstache" "1.0.2.2"
+    , callHackage "mod" "0.1.2.2"
     , callHackage "monad-control" "1.0.3.1"
     , callHackage "monad-logger" "0.3.37"
     , callHackage "monad-time" "0.4.0.0"
diff --git a/overlay.nix b/overlay.nix
index f1b2627a3c178ffd74f20fff69bdac97e5672ce2..aa310e588873c53edae3f3e208e9a22403a1472f 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -495,6 +495,8 @@ final: prev: with pkgs.haskell.lib; {
 
   mockery = prev.callPackage (./pkgs/mockery.nix) { };
 
+  mod = prev.callPackage (./pkgs/mod.nix) { };
+
   monad-control = prev.callPackage (./pkgs/monad-control.nix) { };
 
   monad-logger = prev.callPackage (./pkgs/monad-logger.nix) { };
diff --git a/pkgs/mod.nix b/pkgs/mod.nix
new file mode 100644
index 0000000000000000000000000000000000000000..ab4a9e7a779caa4099812c5da6e8bb6a77542465
--- /dev/null
+++ b/pkgs/mod.nix
@@ -0,0 +1,52 @@
+{ mkDerivation
+, base
+, deepseq
+, integer-gmp
+, lib
+, primitive
+, quickcheck-classes
+, quickcheck-classes-base
+, semirings
+, tasty
+, tasty-bench
+, tasty-quickcheck
+, vector
+}:
+mkDerivation {
+  pname = "mod";
+  version = "0.1.2.2";
+  sha256 = "db98ad817c45e89984428cae6b5f88074220955035520cafe552ce2146f32255";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [
+    base
+    deepseq
+    integer-gmp
+    primitive
+    semirings
+    vector
+  ];
+  testHaskellDepends = [
+    base
+    primitive
+    quickcheck-classes
+    quickcheck-classes-base
+    semirings
+    tasty
+    tasty-quickcheck
+    vector
+  ];
+  benchmarkHaskellDepends = [ base tasty-bench ];
+  enableLibraryProfiling = false;
+  enableExecutableProfiling = false;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  homepage = "https://github.com/Bodigrim/mod";
+  description = "Fast type-safe modular arithmetic";
+  license = lib.licenses.mit;
+  broken = false;
+}