andy@xps ~> ls -tralh /boot/efi/nixos/
total 126M
drwxr-xr-x 5 root root  512 Jun 12  2017 ..
-rwxr-xr-x 1 root root 6.6M Jan 31 19:10 wlpxc9j403m5ba6cm8mvwsphs3sni560-initrd-initrd.efi
-rwxr-xr-x 1 root root 8.7M Jan 31 19:10 rz7wpldjwl1inviy2fzvzx88ds8avjrn-initrd-initrd.efi
-rwxr-xr-x 1 root root 8.6M Jan 31 19:10 pvg89d1gwgsamq9zpqgahcifa1vym5mv-initrd-initrd.efi
-rwxr-xr-x 1 root root 3.9M Jan 31 19:10 ni8gs4iw1jv1jjd8bzgilsiiskjcjx98-linux-4.14.24-bzImage.efi
-rwxr-xr-x 1 root root 8.9M Jan 31 19:10 md5gmmpq2ccncs0x05my75gjm17ygf6i-initrd-initrd.efi
-rwxr-xr-x 1 root root 4.2M Jan 31 19:10 lw80cmp33d48ws3vyybhm1vp9m33ayk8-linux-4.19.18-bzImage.efi
-rwxr-xr-x 1 root root 4.0M Jan 31 19:10 irsr8lc6kypl85ly17x9vkw2wd55vvnj-linux-4.14.79-bzImage.efi
-rwxr-xr-x 1 root root 4.0M Jan 31 19:10 in8635kvln1gkvkkc3n6y9yf7s1cknn3-linux-4.14.59-bzImage.efi
-rwxr-xr-x 1 root root 8.9M Jan 31 19:10 chdm9q0sr5vk9hlg35dly4sbzwkxqrzd-initrd-initrd.efi
-rwxr-xr-x 1 root root 8.7M Jan 31 19:10 cclkh8z1472sbcxy16f34rk041sgq3ml-initrd-initrd.efi
-rwxr-xr-x 1 root root 4.0M Jan 31 19:10 c12hzfhwm960b64x1nsmw107kyppy6an-linux-4.14.68-bzImage.efi
-rwxr-xr-x 1 root root 3.5M Jan 31 19:10 b15vk0xrsr0756n85pwknpqqspdnyvwq-linux-4.9.73-bzImage.efi
-rwxr-xr-x 1 root root 3.5M Jan 31 19:10 azmqzrs9dla1klkk4d9iw98s5rh4cfmk-linux-4.9.78-bzImage.efi
-rwxr-xr-x 1 root root 3.9M Jan 31 19:10 ag7kn4vxlqi9i53r8bmifgfkvb0k8srr-linux-4.14.29-bzImage.efi
-rwxr-xr-x 1 root root 8.9M Jan 31 19:10 9g9977vjw97lg32franlwmh7lf1sxdc8-initrd-initrd.efi
-rwxr-xr-x 1 root root 6.3M Jan 31 19:10 91r532s970hib5cc8m1075bqz40aamqj-initrd-initrd.efi
-rwxr-xr-x 1 root root 3.5M Jan 31 19:10 78cdwf6avay4qlybwr939dr49xa19vzi-linux-4.9.61-bzImage.efi
-rwxr-xr-x 1 root root 4.0M Jan 31 19:10 6qz7m49r2v36sxa838vxgh855f0hvnd5-linux-4.14.72-bzImage.efi
-rwxr-xr-x 1 root root 6.3M Jan 31 19:10 2s549mak5hx0ska1iy91rgisiizinc6x-initrd-initrd.efi
-rwxr-xr-x 1 root root 8.9M Jan 31 19:10 23b4b3yb2s1d2shh6w0vrgyzjpa1qv3h-initrd-initrd.efi
drwxr-xr-x 2 root root 4.0K Jan 31 19:10 .
-rwxr-xr-x 1 root root 7.4M Jan 31 19:10 3b7w34ww3q3lapzib1fsi69pvjpa8l7s-initrd-initrd.efi