+These environment variables can only be set in the configuration files:
+
+.TP
+\fBDISABLE_CDROM\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from CD-ROMs. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel modules for reading CD-ROMs.
+
+.TP
+\fBDISABLE_FAT\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from FAT file systems. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module vfat and some nls_* modules.
+
+.TP
+\fBDISABLE_FUSE\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from FUSE-based file systems. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module fuse and file systems that depend on it (like curlftpfs and httpfs2).
+
+.TP
+\fBDISABLE_NTFS\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from NTFS file systems. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module ntfs.
+
+.TP
+\fBDISABLE_USB\fR=[\fIy\fR|\fIn\fR]
+Disable support for booting from USB devices. If set to '\fIy\fR' mkinitramfs will build an initramfs without the kernel module sd_mod.
+
+.TP
+\fBMINIMAL\fR=[\fIy\fR|\fIn\fR]
+Build a minimal initramfs. If set to '\fIy\fR' mkinitramfs will build an initramfs without some udev scripts and without rsync.