diff --git a/nixos/modules/installer/cd-dvd/iso-image.nix b/nixos/modules/installer/cd-dvd/iso-image.nix
index e22bb866927b..00b869a7b714 100644
--- a/nixos/modules/installer/cd-dvd/iso-image.nix
+++ b/nixos/modules/installer/cd-dvd/iso-image.nix
@@ -52,7 +52,7 @@ let
   buildMenuAdditionalParamsGrub2 = additional:
   let
     finalCfg = {
-      name = "${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel}";
+      name = "${config.isoImage.prependToMenuLabel}${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel}";
       params = "init=${config.system.build.toplevel}/init ${additional} ${toString config.boot.kernelParams}";
       image = "/boot/${config.system.boot.loader.kernelFile}";
       initrd = "/boot/initrd";
@@ -109,35 +109,35 @@ let
     DEFAULT boot
 
     LABEL boot
-    MENU LABEL ${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel}
+    MENU LABEL ${config.isoImage.prependToMenuLabel}${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel}
     LINUX /boot/${config.system.boot.loader.kernelFile}
     APPEND init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams}
     INITRD /boot/${config.system.boot.loader.initrdFile}
 
     # A variant to boot with 'nomodeset'
     LABEL boot-nomodeset
-    MENU LABEL ${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (nomodeset)
+    MENU LABEL ${config.isoImage.prependToMenuLabel}${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (nomodeset)
     LINUX /boot/${config.system.boot.loader.kernelFile}
     APPEND init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams} nomodeset
     INITRD /boot/${config.system.boot.loader.initrdFile}
 
     # A variant to boot with 'copytoram'
     LABEL boot-copytoram
-    MENU LABEL ${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (copytoram)
+    MENU LABEL ${config.isoImage.prependToMenuLabel}${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (copytoram)
     LINUX /boot/${config.system.boot.loader.kernelFile}
     APPEND init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams} copytoram
     INITRD /boot/${config.system.boot.loader.initrdFile}
 
     # A variant to boot with verbose logging to the console
     LABEL boot-debug
-    MENU LABEL ${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (debug)
+    MENU LABEL ${config.isoImage.prependToMenuLabel}${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (debug)
     LINUX /boot/${config.system.boot.loader.kernelFile}
     APPEND init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams} loglevel=7
     INITRD /boot/${config.system.boot.loader.initrdFile}
 
     # A variant to boot with a serial console enabled
     LABEL boot-serial
-    MENU LABEL ${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (serial console=ttyS0,115200n8)
+    MENU LABEL ${config.isoImage.prependToMenuLabel}${config.system.nixos.distroName} ${config.system.nixos.label}${config.isoImage.appendToMenuLabel} (serial console=ttyS0,115200n8)
     LINUX /boot/${config.system.boot.loader.kernelFile}
     APPEND init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams} console=ttyS0,115200n8
     INITRD /boot/${config.system.boot.loader.initrdFile}
@@ -452,6 +452,7 @@ in
 
     isoImage.isoName = mkOption {
       default = "${config.isoImage.isoBaseName}.iso";
+      type = lib.types.str;
       description = lib.mdDoc ''
         Name of the generated ISO image file.
       '';
@@ -459,6 +460,7 @@ in
 
     isoImage.isoBaseName = mkOption {
       default = config.system.nixos.distroId;
+      type = lib.types.str;
       description = lib.mdDoc ''
         Prefix of the name of the generated ISO image file.
       '';
@@ -466,6 +468,7 @@ in
 
     isoImage.compressImage = mkOption {
       default = false;
+      type = lib.types.bool;
       description = lib.mdDoc ''
         Whether the ISO image should be compressed using
         {command}`zstd`.
@@ -479,15 +482,16 @@ in
                 + lib.optionalString isAarch "-Xbcj arm"
                 + lib.optionalString (isPower && is32bit && isBigEndian) "-Xbcj powerpc"
                 + lib.optionalString (isSparc) "-Xbcj sparc";
+      type = lib.types.str;
       description = lib.mdDoc ''
         Compression settings to use for the squashfs nix store.
       '';
       example = "zstd -Xcompression-level 6";
-      type = types.str;
     };
 
     isoImage.edition = mkOption {
       default = "";
+      type = lib.types.str;
       description = lib.mdDoc ''
         Specifies which edition string to use in the volume ID of the generated
         ISO image.
@@ -497,6 +501,7 @@ in
     isoImage.volumeID = mkOption {
       # nixos-$EDITION-$RELEASE-$ARCH
       default = "nixos${optionalString (config.isoImage.edition != "") "-${config.isoImage.edition}"}-${config.system.nixos.release}-${pkgs.stdenv.hostPlatform.uname.processor}";
+      type = lib.types.str;
       description = lib.mdDoc ''
         Specifies the label or volume ID of the generated ISO image.
         Note that the label is used by stage 1 of the boot process to
@@ -527,6 +532,7 @@ in
 
     isoImage.includeSystemBuildDependencies = mkOption {
       default = false;
+      type = lib.types.bool;
       description = lib.mdDoc ''
         Set this option to include all the needed sources etc in the
         image. It significantly increases image size. Use that when
@@ -538,6 +544,7 @@ in
 
     isoImage.makeBiosBootable = mkOption {
       default = false;
+      type = lib.types.bool;
       description = lib.mdDoc ''
         Whether the ISO image should be a BIOS-bootable disk.
       '';
@@ -545,6 +552,7 @@ in
 
     isoImage.makeEfiBootable = mkOption {
       default = false;
+      type = lib.types.bool;
       description = lib.mdDoc ''
         Whether the ISO image should be an EFI-bootable volume.
       '';
@@ -552,6 +560,7 @@ in
 
     isoImage.makeUsbBootable = mkOption {
       default = false;
+      type = lib.types.bool;
       description = lib.mdDoc ''
         Whether the ISO image should be bootable from CD as well as USB.
       '';
@@ -616,8 +625,22 @@ in
       '';
     };
 
+    isoImage.prependToMenuLabel = mkOption {
+      default = "";
+      type = types.str;
+      example = "Install ";
+      description = lib.mdDoc ''
+        The string to prepend before the menu label for the NixOS system.
+        This will be directly prepended (without whitespace) to the NixOS version
+        string, like for example if it is set to `XXX`:
+
+        `XXXNixOS 99.99-pre666`
+      '';
+    };
+
     isoImage.appendToMenuLabel = mkOption {
       default = " Installer";
+      type = types.str;
       example = " Live System";
       description = lib.mdDoc ''
         The string to append after the menu label for the NixOS system.