Disko Disk Image Script: Can't set password interactively

[snipcola]

I can successfully build the image script with:

sudo nix build .#nixosConfigurations.desktop.config.system.build.diskoImagesScript

However, when I run sudo ./result --build-memory 4096, I see the following logs:

...
Enter password for /dev/disk/by-partlabel/disk-external-luks: 
Enter password for /dev/disk/by-partlabel/disk-external-luks again to be safe: 
++ set +x
+ cryptsetup -q luksFormat /dev/disk/by-partlabel/disk-external-luks --key-file /dev/fd/63
Nothing to read on input.
+ rm -rf /tmp/tmp.l5FKiqm01m
[    4.374946] reboot: Power down

I have askPassword set to true, but it doesn't allow me to input my password.

disks.nix

{
  disko.devices = {
    disk = {
      main = {
        type = "disk";
        device = "/dev/disk/by-id/ata-Samsung_SSD_850_EVO_500GB_S2RBNX0J125698T";

        content = {
          type = "gpt";

          partitions = {
            ESP = {
              size = "500M";
              type = "EF00";

              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = [ "umask=0077" ];
              };
            };

            luks = {
              size = "100%";

              content = {
                type = "luks";
                name = "system";
                settings.allowDiscards = true;
                askPassword = true;

                content = {
                  type = "filesystem";
                  format = "ext4";
                  mountpoint = "/";
                  extraArgs = [ "-LSystem" ];
                };
              };
            };
          };
        };
      };

      external = {
        type = "disk";
        device = "/dev/disk/by-id/ata-CT1000BX500SSD1_2436E98BA987";

        content = {
          type = "gpt";

          partitions = {
            luks = {
              size = "100%";

              content = {
                type = "luks";
                name = "external";
                settings.allowDiscards = true;
                askPassword = true;

                content = {
                  type = "filesystem";
                  format = "ext4";
                  mountpoint = "/media/external";
                  extraArgs = [ "-LExternal" ];
                };
              };
            };
          };
        };
      };
    };
  };
}