diff --git a/common.nix b/common.nix
index 97c4a9b..1a7a293 100644
--- a/common.nix
+++ b/common.nix
@@ -49,6 +49,11 @@
     
     config = {
       allowUnfree = true;
+      permittedInsecurePackages = [
+        "hadoop-3.3.1"
+        "libressl-3.4.3"
+        "python3.12-ecdsa-0.19.1"
+      ];
     };
   };
 
diff --git a/home-manager/modules/packages.nix b/home-manager/modules/packages.nix
index 746dcb7..ec27f36 100644
--- a/home-manager/modules/packages.nix
+++ b/home-manager/modules/packages.nix
@@ -31,14 +31,6 @@ with pkgs; let
       west
       pyelftools
     ]);
-  maven363 = pkgs.maven.overrideAttrs (old: rec {
-    pname = "apache-maven";
-    version = "3.6.3";
-    src = pkgs.fetchurl {
-      url = "mirror://apache/maven/maven-3/${version}/binaries/${pname}-${version}-bin.tar.gz";
-      sha256 = "sha256-Jq2R11GzqaUwh676dD9OFqF3QdORWyGc90ESv4ekOMU=";
-    };
-  });
 in {
   home.packages = with pkgs; [
     gitAndTools.gitFull
diff --git a/overlays/default.nix b/overlays/default.nix
index 7bfcb4c..c7622a7 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -7,9 +7,14 @@
   # You can change versions, add patches, set compilation flags, anything really.
   # https://nixos.wiki/wiki/Overlays
   modifications = final: prev: {
-    # example = prev.example.overrideAttrs (oldAttrs: rec {
-    # ...
-    # });
+    maven363 = prev.maven.overrideAttrs (old: rec {
+      pname = "apache-maven";
+      version = "3.6.3";
+      src = prev.fetchurl {
+        url = "mirror://apache/maven/maven-3/${version}/binaries/${pname}-${version}-bin.tar.gz";
+        sha256 = "sha256-Jq2R11GzqaUwh676dD9OFqF3QdORWyGc90ESv4ekOMU=";
+      };
+    });
   };
 
   # When applied, the unstable nixpkgs set (declared in the flake inputs) will