diff --git a/manifest.dhall b/manifest.dhall
index dd1b09c9b07ad146cb915e2f3aa69c6da03bd53c..a4e9af860c1b1245d11176bcc0dcee0a1f438ea2 100644
--- a/manifest.dhall
+++ b/manifest.dhall
@@ -498,6 +498,7 @@ in  [ callHackage "Cabal" "3.8.1.0"
     , callHackage "lukko" "0.1.1.3"
     , callHackage "neat-interpolation" "0.5.1.3"
     , callHackage "net-mqtt" "0.8.2.2"
+    , callHackage "managed" "1.0.9"
     , callHackage "markdown-unlit" "0.5.1"
     , callHackage "math-functions" "0.3.4.2"
     , callHackage "megaparsec" "9.2.2"
diff --git a/overlay.nix b/overlay.nix
index d001b48f360caaf8c0085d3d04f0e187f2e2bc83..901ae671c400c17d6cbc5bc8c1a3bc9b243e9614 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -741,6 +741,8 @@ self: with pkgs.haskell.lib; {
 
   lukko = self.callPackage (./pkgs/lukko.nix) { };
 
+  managed = self.callPackage (./pkgs/managed.nix) { };
+
   markdown-unlit = self.callPackage (./pkgs/markdown-unlit.nix) { };
 
   math-functions = self.callPackage (./pkgs/math-functions.nix) { };
diff --git a/pkgs/managed.nix b/pkgs/managed.nix
new file mode 100644
index 0000000000000000000000000000000000000000..f6103e6d216b799b6541c159f7cec8ac1e206cac
--- /dev/null
+++ b/pkgs/managed.nix
@@ -0,0 +1,22 @@
+{ mkDerivation, base, lib, transformers }:
+mkDerivation {
+  pname = "managed";
+  version = "1.0.9";
+  sha256 = "4d476da3b6e7a14220f2e3a764e5d43bf339e89a3dc46a7bdfdeb3856a54a86f";
+  revision = "2";
+  editedCabalFile = "1hnhi2d5s06bhp2klf9xw9yipymisfyfvb83b6rqfiy549z6ij27";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [ base transformers ];
+  enableLibraryProfiling = false;
+  enableExecutableProfiling = false;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  description = "A monad for managed values";
+  license = lib.licenses.bsd3;
+  broken = false;
+}