Applying ./patches/0001-OpenSSL-1.1.0-compile-fix.patch using plaintext: 
patching file crypto.c

Applying ./patches/010-openssl-deprecated.patch using plaintext: 
patching file crypto.c

Applying ./patches/020-cdefs.patch using plaintext: 
patching file ar.h
make[4]: Entering directory '/builder/shared-workdir/build/sdk/build_dir/target-arm_cortex-a9+neon_musl_eabi/chaosvpn-2.19'
yacc -d cvconf.y
arm-openwrt-linux-muslgnueabi-gcc -Os -pipe -fno-caller-saves -fno-plt -fhonour-copts -mfloat-abi=hard -ffile-prefix-map=/builder/shared-workdir/build/sdk/build_dir/target-arm_cortex-a9+neon_musl_eabi/chaosvpn-2.19=chaosvpn-2.19 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro  -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-arm_cortex-a9+neon_gcc-12.2.0_musl_eabi/usr/include -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-arm_cortex-a9+neon_gcc-12.2.0_musl_eabi/include/fortify -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-arm_cortex-a9+neon_gcc-12.2.0_musl_eabi/include  -std=c99 -D_POSIX_C_SOURCE=2 -D_BSD_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -Wall -g -I/usr/local/include -DPREFIX="\"/usr\"" -DTINCDIR="\"/etc/tinc\"" -o main.o -c main.c
In file included from main.c:18:
chaosvpn.h:16:10: fatal error: openssl/ssl.h: No such file or directory
   16 | #include <openssl/ssl.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
make[4]: *** [Makefile:55: main.o] Error 1
make[4]: Leaving directory '/builder/shared-workdir/build/sdk/build_dir/target-arm_cortex-a9+neon_musl_eabi/chaosvpn-2.19'
make[3]: *** [Makefile:55: /builder/shared-workdir/build/sdk/build_dir/target-arm_cortex-a9+neon_musl_eabi/chaosvpn-2.19/.built] Error 2
time: package/feeds/packages/chaosvpn/compile#0.50#0.09#0.95