grub2 compile failed

./build-grub-mkfont -o unicode.pf2 ./unifont.pcf || (rm -f unicode.pf2; exit 1)
PATH=.:$PATH pkgdatadir=. /usr/bin/help2man --section=8 -i /var/tmp/portage/sys-boot/grub-2.02_beta2-r3/work/grub-2.02~beta2/docs/man/grub-reboot.h2m -o grub-reboot.8 grub-reboot
can't open file ./unifont.pcf, index 0: error 2: unknown file format
./build-grub-mkfont -o ascii.pf2 ./unifont.pcf -r 0x0-0x7f,0x2190-0x2193,0x2501-0x251B || (rm -f ascii.pf2; exit 1)
can't open file ./unifont.pcf, index 0: error 2: unknown file format
./build-grub-mkfont -o euro.pf2 ./unifont.pcf -r 0x0-0x4ff,0x1e00-0x1fff,0x2190-0x2193,0x2501-0x251B || (rm -f euro.pf2; exit 1)
can't open file ./unifont.pcf, index 0: error 2: unknown file format
./build-grub-gen-asciih ./unifont.pcf ascii.h || (rm -f ascii.h; exit 1)
./build-grub-gen-widthspec ./unifont.pcf widthspec.h || (rm -f widthspec.h; exit 1)
can't open file ./unifont.pcf, index 0: error 2: unknown file format
Makefile:13381: recipe for target 'ascii.h' failed
make[2]: *** [ascii.h] Error 1
make[2]: *** Waiting for unfinished jobs....
can't open file ./unifont.pcf, index 0: error 2: unknown file format
Makefile:13384: recipe for target 'widthspec.h' failed
make[2]: *** [widthspec.h] Error 1
make[2]: Leaving directory '/var/tmp/portage/sys-boot/grub-2.02_beta2-r3/work/grub-2.02~beta2-pc'
Makefile:11531: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/portage/sys-boot/grub-2.02_beta2-r3/work/grub-2.02~beta2-pc'
Makefile:3927: recipe for target 'all' failed
make: *** [all] Error 2
 * ERROR: sys-boot/grub-2.02_beta2-r3::gentoo failed (compile phase):
 *   emake failed

$ equery u grub
[ Legend : U - final flag setting for installation]
[        : I - package is installed with flag     ]
[ Colors : set, unset                             ]
 * Found these USE flags for sys-boot/grub-2.00_p5107-r2:
 U I
 - - custom-cflags
 - - debug
 - - device-mapper 
 - - doc           
 - - efiemu             
 - - grub_platforms_coreboot 
 - - grub_platforms_efi-32    
 - - grub_platforms_efi-64    
 - - grub_platforms_emu       
 - - grub_platforms_ieee1275  
 + + grub_platforms_multiboot 
 + + grub_platforms_pc       
 - - grub_platforms_qemu      
 - - grub_platforms_qemu-mips 
 - - grub_platforms_yeeloong  
 - - mount                  
 + - multislot                
 + + nls                      
 - - sdl                      
 - - static                  
 - - test                     
 + + truetype