diff --git a/common/ccid-overlay.nix b/common/ccid-overlay.nix
new file mode 100644
index 0000000..eb4c029
--- /dev/null
+++ b/common/ccid-overlay.nix
@@ -0,0 +1,18 @@
+{ config, pkgs, ... }: {
+  nixpkgs.overlays = [
+    (self: super: {
+      ccid = super.ccid.overrideAttrs (old: rec {
+        pname = "ccid";
+        version = "1.5.5";
+        src = super.fetchurl {
+          url = "https://ccid.apdu.fr/files/${pname}-${version}.tar.bz2";
+          hash = "sha256-GUcI91/jadRd18Feiz6Kfbi0nPxVV1dMoqLnbvEsoMo=";
+        };
+        postPatch = ''
+          patchShebangs .
+          substituteInPlace src/Makefile.in --replace-fail /bin/echo echo
+        '';
+      });
+    })
+  ];
+}
diff --git a/hosts/lambdaos/configuration.nix b/hosts/lambdaos/configuration.nix
index a2b2e22..03bab58 100644
--- a/hosts/lambdaos/configuration.nix
+++ b/hosts/lambdaos/configuration.nix
@@ -12,6 +12,7 @@
       ../../modules/plasma
 
       ../../common
+      ../../common/ccid-overlay.nix
 
       ./restic.nix
     ];
@@ -48,22 +49,6 @@
     nvidia.acceptLicense = true;
     cudaSupport = true;
   };
-  nixpkgs.overlays = [
-    (self: super: {
-      ccid = super.ccid.overrideAttrs (old: rec {
-        pname = "ccid";
-        version = "1.5.5";
-        src = super.fetchurl {
-          url = "https://ccid.apdu.fr/files/${pname}-${version}.tar.bz2";
-          hash = "sha256-GUcI91/jadRd18Feiz6Kfbi0nPxVV1dMoqLnbvEsoMo=";
-        };
-        postPatch = ''
-          patchShebangs .
-          substituteInPlace src/Makefile.in --replace-fail /bin/echo echo
-        '';
-      });
-    })
-  ];
 
   networking = {
     hostName = "lambdaOS"; # Define your hostname.
diff --git a/hosts/muos/configuration.nix b/hosts/muos/configuration.nix
index 5a42284..dd4cd37 100644
--- a/hosts/muos/configuration.nix
+++ b/hosts/muos/configuration.nix
@@ -12,6 +12,7 @@
       ./hardware-configuration.nix
 
       ../../common
+      ../../common/ccid-overlay.nix
     ];