diff --git a/overlays/calibre-dedrm/default.nix b/overlays/calibre-dedrm/default.nix
new file mode 100644
index 0000000..17ccda5
--- /dev/null
+++ b/overlays/calibre-dedrm/default.nix
@@ -0,0 +1,7 @@
+self: super: {
+  calibre-dedrm =
+    super.calibre.overrideAttrs (oa: {
+      # We want to have pycryptodome around in order to support DeDRM
+      nativeBuildInputs = oa.nativeBuildInputs ++ [ self.python3Packages.pycryptodome ];
+    });
+}
diff --git a/overlays/default.nix b/overlays/default.nix
index e504b17..14c2ef2 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -1,3 +1,3 @@
 {
-  # No overlays
+  calibre-dedrm = import ./calibre-dedrm;
 }