diff --git a/pkgs/development/lisp-modules/packages.nix b/pkgs/development/lisp-modules/packages.nix
index 307bd90dd72e..480b304ca221 100644
--- a/pkgs/development/lisp-modules/packages.nix
+++ b/pkgs/development/lisp-modules/packages.nix
@@ -893,6 +893,26 @@ let
     };
   });
 
+  fset = super.fset.overrideLispAttrs (old: rec {
+    version = "1.4.0";
+    src = pkgs.fetchFromGitHub {
+      owner = "slburson";
+      repo = "fset";
+      rev = "v${version}";
+      hash = "sha256-alO8Ek5Xpyl5N99/LgyIZ50aoRbY7bKh3XBntFV6Q5k=";
+    };
+    lispLibs = with super; [
+      self.misc-extensions
+      mt19937
+      named-readtables
+    ];
+    meta = {
+      description = "functional collections library";
+      homepage = "https://gitlab.common-lisp.net/fset/fset/-/wikis/home";
+      license = pkgs.lib.licenses.llgpl21;
+    };
+  });
+
   });
 
 in packages