diff --git a/README.md b/README.md
index 6dfff16..22c5ca0 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 This will allow you to unlock your luks encrypted disk with an fido2 compatible key
 
-Note: This has only been tested under Fedora 31 using a Solo Key, Trezor Model T
+Note: This has only been tested under Fedora 31, [Ubuntu 20.04](initramfs-tools/), [NixOS](https://nixos.org/nixos/manual/#sec-luks-file-systems-fido2) using a Solo Key, Trezor Model T
 
 ## Setup
 
diff --git a/initramfs-tools/README.md b/initramfs-tools/README.md
new file mode 100644
index 0000000..63f11a2
--- /dev/null
+++ b/initramfs-tools/README.md
@@ -0,0 +1,13 @@
+## Initramfs-tools based systems(Ubuntu and derivatives)
+
+After installation generate your credentials and add keys to your disk as described in the top-level README
+then add `initramfs,keyscript=fido2luks` to your `/etc/crypttab`
+
+Example:
+```
+sda6_crypt UUID=9793d81a-4cfb-4712-85f3-c7a8d715112c none luks,discard,initramfs,keyscript=fido2luks
+```
+
+But don't forget to run `make install` which will install all necessary scripts and regenerate your intrid.
+
+[Recording showing part of the setup](https://shimun.net/fido2luks/setup.svg)
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