FreeBSD sources expected at /usr/src

Starting at Wed Feb 19 17:53:30 +03 2020
Loading configuration from config.sh
Board: OrangePi-One
Option: ImageSize 3900mb
Option: Growfs 
Option: User tldrm
Source version is: 358099
Building FreeBSD version: 13.0
Image name is:
    /var/tmp/c/crochet/work/FreeBSD-armv7-13.0-GENERIC-358099-OrangePi-One.img
Building FreeBSD version: 13.0
Object files are at: /var/tmp/c/crochet/work/obj/var/tmp/c/src-head
Found suitable FreeBSD source tree in:
    /var/tmp/c/src-head
Found U-Boot port in:
    /usr/local/share/u-boot/u-boot-orangepi-one
Building FreeBSD armv7 world at Wed Feb 19 17:53:37 +03 2020
    (Logging to /var/tmp/c/crochet/work/_.buildworld.armv7.log)
Building FreeBSD armv7-GENERIC kernel at Wed Feb 19 19:08:14 +03 2020
    (Logging to /var/tmp/c/crochet/work/_.buildkernel.armv7-GENERIC.log)
Building FreeBSD armv7-GENERIC ubldr at Wed Feb 19 19:12:33 +03 2020
    (Logging to /var/tmp/c/crochet/work/ubldr-armv7-GENERIC/_.ubldr.armv7-GENERIC.build.log)
Creating a 3900MB raw disk image in:
    /var/tmp/c/crochet/work/FreeBSD-armv7-13.0-GENERIC-358099-OrangePi-One.img
Installing U-Boot files
448+1 records in
449+0 records out
459776 bytes transferred in 0.099463 secs (4622583 bytes/sec)
448+1 records in
449+0 records out
459776 bytes transferred in 0.115297 secs (3987753 bytes/sec)
Partitioning the raw disk image with MBR at Wed Feb 19 19:13:12 +03 2020
gpart create -s MBR md0
md0 created
Creating a 32m FAT partition at Wed Feb 19 19:13:12 +03 2020 with start block 1m and label BOOT
active set on md0s1
Creating a 2560m UFS partition at Wed Feb 19 19:13:12 +03 2020
md0s2 created
/dev/md0s2a: 2560.0MB (5242880 sectors) block size 32768, fragment size 4096
        using 5 cylinder groups of 626.09MB, 20035 blks, 80256 inodes.
super-block backups (for fsck_ffs -b #) at:
 192, 1282432, 2564672, 3846912, 5129152
tunefs: soft updates set
Using inode 4 in cg 0 for 4194304 byte journal
tunefs: soft updates journaling set
tunefs: NFSv4 ACLs set
Mounting all file systems:
Mounting FAT partition 1 at /var/tmp/c/crochet/work/_.mount.boot
Mounting UFS partition 1 at /var/tmp/c/crochet/work/_.mount.freebsd
Installing ubldr in /var/tmp/c/crochet/work/_.mount.boot
=== Running: MACHINE=arm /usr/src/sys/tools/fdt/make_dtb.sh /var/tmp/c/src-head/sys /usr/src/sys/gnu/dts/arm/sun8i-h3-orangepi-one.dts /var/tmp/c/crochet/work/opione ===
sh: /usr/src/sys/tools/fdt/make_dtb.sh: not found

A workaround (for an empty /usr/src) might be

rmdir /usr/src
ln -s PATHTOYOURSRC /usr/src

freebsd / crochet

FreeBSD sources expected at /usr/src #287