Hello @ all the build script -> https://xn--4db.cc/IKuBc62Z fails on OpenBSD 6.5 The Output : foo# ./install.sh     [+] Preparing build directory in /usr/src/wireguard [+] Installing dependencies quirks-3.124 signed on 2019-09-22T21:00:10Z [+] Fetching latest versions Trying 147.75.105.169... Requesting https://build.wireguard.com/distros.txt 1978 bytes received in 0.00 seconds (12.69 MB/s) [+] Fetching and unpacking archives Trying 147.75.77.251... Requesting https://git.zx2c4.com/WireGuard/snapshot/WireGuard-0.0.20190913.tar.xz 330788 bytes received in 1.55 seconds (208.92 KB/s) Trying 147.75.77.251... Requesting https://git.zx2c4.com/wireguard-go/snapshot/wireguard-go-0.0.20190908.tar.xz 79212 bytes received in 0.51 seconds (150.46 KB/s) [+] Building wg(8) and wg-quick(8) tools gmake: Entering directory '/usr/src/wireguard/WireGuard-0.0.20190913/src/tools'   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/wg.o   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/set.o   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/mnlg.o   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/pubkey.o   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/showconf.o   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/genkey.o   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/setconf.o   CC      /usr/src/wireguard/WireGuard-0.0.20190913/src/tools/curve25519.o wg.c:6:10: fatal error: 'stddef.h' file not found #include          ^~~~~~~~~~ set.c:6:10: fatal error: 'stdio.h' file not found #include          ^~~~~~~~~ 1 error generated. 1 error generated. showconf.c:6:10: fatal error: 'arpa/inet.h' file not found #include          ^~~~~~~~~~~~~ genkey.c:6:10: fatal error: 'errno.h' file not found #include          ^~~~~~~~~ pubkey.c:6:10: fatal error: 'errno.h' file not found #include          ^~~~~~~~~ 1 error generated. 1 error generated. setconf.c:6:10: fatal error: 'stddef.h' file not found #include          ^~~~~~~~~~ 1 error generated. In file included from curve25519.c:6: ./curve25519.h:9:10: fatal error: 'stdint.h' file not found 1 error#include generated .          ^~~~~~~~~~ 1 error generated. gmake: *** [: set.o] Error 1 gmake: *** Waiting for unfinished jobs.... gmake: *** [: wg.o] Error 1 gmake: *** [: pubkey.o] Error 1 gmake: *** [: curve25519.o] Error 1 gmake: *** [: setconf.o] Error 1 gmake: *** [: genkey.o] Error 1 gmake: *** [: showconf.o] Error 1 gmake: Leaving directory '/usr/src/wireguard/WireGuard-0.0.20190913/src/tools' [+] Cleaning up build directory foo# The System is a Plain OpenBSD with this Packages.total 212 drwxr-xr-x  53 root  wheel  1536 Sep 23 14:05 . drwxr-xr-x   7 root  wheel   512 Sep 23 11:49 .. drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 acx-firmware-1.4p5 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 amdgpu-firmware-20181218 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 athn-firmware-1.1p4 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 bash-5.0.3 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 bwfm-firmware-20171125 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 bwi-firmware-1.4p4 drwxr-xr-x   2 root  wheel   512 Sep 23 14:03 bzip2-1.0.6p10 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 curl-7.64.1p1 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 cvsps-2.1p2 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 desktop-file-utils-0.23p10 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 gettext-0.19.8.1p3 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 git-2.21.0 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 glib2-2.58.3p9 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 gmake-4.2.1p0 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 go-1.12.1 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 htop-2.2.0p8 drwxr-xr-x   2 root  wheel   512 Sep 23 11:41 intel-firmware-20190514p0v0 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 inteldrm-firmware-20181218 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 ipw-firmware-1.3p2 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 iwi-firmware-3.1p2 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 iwm-firmware-0.20170105 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 iwn-firmware-5.11p1 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 libffi-3.2.1p5 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 libiconv-1.14p3 drwxr-xr-x   2 root  wheel   512 Sep 23 14:03 libidn2-2.0.0p0 drwxr-xr-x   2 root  wheel   512 Sep 23 14:03 libpsl-0.20.2 drwxr-xr-x   2 root  wheel   512 Sep 23 14:03 libunistring-0.9.7 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 malo-firmware-1.4p4 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 nano-4.0 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 nghttp2-1.37.0 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 nload-0.7.4p4 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 otus-firmware-1.0p1 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 p5-Error-0.17025 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 pcre-8.41p2 drwxr-xr-x   2 root  wheel   512 Sep 23 14:03 pcre2-10.32 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 pgt-firmware-1.2p4 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 python-3.6.8p0 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 quirks-3.124 drwxr-xr-x   2 root  wheel   512 Sep 23 11:41 radeondrm-firmware-20181218 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 rsu-firmware-1.2p1 drwxr-xr-x   2 root  wheel   512 Sep 23 14:05 rsync-3.1.3 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 rtwn-firmware-20180103 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 sqlite3-3.27.2p0 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 uath-firmware-2.0p1 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 upgt-firmware-1.1p4 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 urtwn-firmware-20180103 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 uvideo-firmware-1.2p2 drwxr-xr-x   2 root  wheel   512 Sep 23 11:41 vmm-firmware-1.11.0p1 drwxr-xr-x   2 root  wheel   512 Sep 23 14:03 wget-1.20.3 drwxr-xr-x   2 root  wheel   512 Sep 23 12:05 wpi-firmware-3.2p1 drwxr-xr-x   2 root  wheel   512 Sep 23 11:51 xz-5.2.4 Regards Ulli