diff --git a/horizon.dhall b/horizon.dhall
index 55364cf0adbe530aa6889c8bb14161af4a155d53..4cfacfe9e82a943380194e07aea4778163d6cddc 100644
--- a/horizon.dhall
+++ b/horizon.dhall
@@ -89,6 +89,7 @@ let packages =
       , abstract-deque-tests = H.callHackage "abstract-deque-tests" "0.3"
       , abstract-deque = H.callHackage "abstract-deque" "0.3"
       , abstract-par = H.callHackage "abstract-par" "0.3.3"
+      , active = H.callHackage "active" "0.2.0.16"
       , adjunctions = H.callHackage "adjunctions" "4.4.2"
       , aeson = H.callHackage "aeson" "2.1.0.0"
       , aeson-pretty = H.callHackage "aeson-pretty" "0.8.9"
diff --git a/initial-packages.nix b/initial-packages.nix
index c1aff50f187a0a7cf87e8e3d1a13e060913f0c8a..9a64ea26b0f5542b36d7f42eb516d2073c5d020a 100644
--- a/initial-packages.nix
+++ b/initial-packages.nix
@@ -77,6 +77,8 @@ self: with pkgs.haskell.lib; {
 
   abstract-par = self.callPackage (./pkgs/abstract-par.nix) { };
 
+  active = self.callPackage (./pkgs/active.nix) { };
+
   adjunctions = self.callPackage (./pkgs/adjunctions.nix) { };
 
   aeson = self.callPackage (./pkgs/aeson.nix) { };
diff --git a/pkgs/active.nix b/pkgs/active.nix
new file mode 100644
index 0000000000000000000000000000000000000000..9379f7f26e5247d265398d1808af13b180f2ffda
--- /dev/null
+++ b/pkgs/active.nix
@@ -0,0 +1,47 @@
+{ mkDerivation
+, QuickCheck
+, base
+, lens
+, lib
+, linear
+, semigroupoids
+, semigroups
+, vector
+}:
+mkDerivation {
+  pname = "active";
+  version = "0.2.0.16";
+  sha256 = "f1187ebbffd560c4eb39864f8ad0a6aac4585ba6c956ba5572e90632bdcee2bb";
+  revision = "1";
+  editedCabalFile = "0cyfwrr5c14f5rgrf8dv7i8qsrnmnzigw0xp6l88kfxd61zhk4n8";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [
+    base
+    lens
+    linear
+    semigroupoids
+    semigroups
+    vector
+  ];
+  testHaskellDepends = [
+    base
+    lens
+    linear
+    QuickCheck
+    semigroupoids
+    semigroups
+    vector
+  ];
+  enableLibraryProfiling = true;
+  enableExecutableProfiling = true;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  description = "Abstractions for animation";
+  license = lib.licenses.bsd3;
+  broken = false;
+}