diff --git a/pkgs/applications/science/logic/anders/default.nix b/pkgs/applications/science/logic/anders/default.nix
new file mode 100644
index 000000000000..72e412fc3bdc
--- /dev/null
+++ b/pkgs/applications/science/logic/anders/default.nix
@@ -0,0 +1,24 @@
+{ lib, fetchFromGitHub, ocamlPackages }:
+
+ocamlPackages.buildDunePackage rec {
+  pname = "anders";
+  version = "1.1.1";
+
+  useDune2 = true;
+
+  src = fetchFromGitHub {
+    owner = "groupoid";
+    repo = "anders";
+    rev = "${version}";
+    sha256 = "sha256-JUiZoo2rNLfgs94TlJqUNzul/7ODisCjSFAzhgSp1z4=";
+  };
+
+  buildInputs = with ocamlPackages; [ zarith menhir ];
+
+  meta = with lib; {
+    description = "Modal Homotopy Type System";
+    homepage = "https://homotopy.dev/";
+    license = licenses.isc;
+    maintainers = [ maintainers.suhr ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 080645eb2e7b..5755b82a0bb6 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -182,6 +182,8 @@ with pkgs;
 
   althttpd = callPackage ../servers/althttpd { };
 
+  anders = callPackage ../applications/science/logic/anders { };
+
   ankisyncd = callPackage ../servers/ankisyncd { };
 
   aocd = with python3Packages; toPythonApplication aocd;