diff --git a/manifest.dhall b/manifest.dhall
index 8bcf3436d58589fe592d60ce0cafa826326d5ec3..7fade796ed3faa677230cd2a813a2d71a32b099b 100644
--- a/manifest.dhall
+++ b/manifest.dhall
@@ -81,6 +81,7 @@ in  [ callHackage "Cabal" "3.8.1.0"
     , callHackage "asn1-types" "0.3.4"
     , callHackage "assoc" "1.0.2"
     , callHackage "async" "2.2.4"
+    , callHackage "attoparsec-iso8601" "1.1.0.0"
     , callHackage "attoparsec" "0.14.4"
     , callHackage "autodocodec" "0.2.0.1"
     , callHackage "autodocodec-schema" "0.1.0.2"
diff --git a/overlay.nix b/overlay.nix
index f3c381f8750613fd90db997f391a8549a497df98..7c8b211c6e7d71dc5921736a51e33d67fe7001d5 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -47,6 +47,8 @@ final: prev: with pkgs.haskell.lib; {
 
   attoparsec = prev.callPackage (./pkgs/attoparsec.nix) { };
 
+  attoparsec-iso8601 = prev.callPackage (./pkgs/attoparsec-iso8601.nix) { };
+
   autodocodec = prev.callPackage (./pkgs/autodocodec.nix) { };
 
   autodocodec-schema = prev.callPackage (./pkgs/autodocodec-schema.nix) { };
diff --git a/pkgs/attoparsec-iso8601.nix b/pkgs/attoparsec-iso8601.nix
new file mode 100644
index 0000000000000000000000000000000000000000..64ff7f228a5b597bfef3574cc9ab33c9dc72a5cd
--- /dev/null
+++ b/pkgs/attoparsec-iso8601.nix
@@ -0,0 +1,36 @@
+{ mkDerivation
+, attoparsec
+, base
+, base-compat-batteries
+, lib
+, text
+, time
+, time-compat
+}:
+mkDerivation {
+  pname = "attoparsec-iso8601";
+  version = "1.1.0.0";
+  sha256 = "1109a817c448a154ec58047a8f01282530cb40d20fbd5690bc58b1443ecb264a";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [
+    attoparsec
+    base
+    base-compat-batteries
+    text
+    time
+    time-compat
+  ];
+  enableLibraryProfiling = false;
+  enableExecutableProfiling = false;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  homepage = "https://github.com/haskell/aeson";
+  description = "Parsing of ISO 8601 dates, originally from aeson";
+  license = lib.licenses.bsd3;
+  broken = false;
+}