% nix develop .#libressl
Setting up libressl environment from flake.nix...
nix/shell.sh: Entering a devShell
Libcrypto binary /nix/store/4f3ym237jqxcrld66vhfnsh0bjkp2n9b-openssl-1.0.2/bin/openssl available as openssl102
Libcrypto binary /nix/store/2c8cbb1dz21jbgnvgdr3j6qmy8scfay7-openssl-1.1.1/bin/openssl available as openssl111
Libcrypto binary /nix/store/9igixz75ng2hvhg9x551dlkiy37gj0x1-openssl-3.0.7/bin/openssl available as openssl30
Libcrypto binary /nix/store/k9mlwq9f436jbq6sd6mzxkd7vms0jd5b-aws-lc/bin/bssl available as awslc
Libcrypto binary /nix/store/sm35za7zh6z22ibswdfc8z2a0kk7dcj8-aws-lc-fips-2022/bin/bssl available as awslcfips2022
Libcrypto binary /nix/store/hcqgjy9ni2ga7iwvr6vv1vnxw6q2lwxx-aws-lc-fips-2024/bin/bssl available as awslcfips2024
Libcrypto binary /nix/store/0w7ih5v7yiinm6h9rgdsa7f82v3h6fhz-libressl-4.0.0-bin/bin/openssl available as libressl
(nix:nix-shell-env) [nix libressl] dougch@kronk:~/gitrepos/s2n-tls$ libressl version
LibreSSL 4.0.0

% clean;configure;build
...
[nix libressl] dougch@kronk:~/gitrepos/s2n-tls$ ldd ./build/lib/libs2n.so
        linux-vdso.so.1 (0x0000fffff7ffe000)
        libcrypto.so.55 => /nix/store/z1lazn2z4a1givdlvmdrg1bhl1va9lv7-libressl-4.0.0/lib/libcrypto.so.55 (0x0000fffff7c20000)
        libdl.so.2 => /nix/store/1i8majcp529x3c54gindgs92aqi4d59y-glibc-2.40-66/lib/libdl.so.2 (0x0000fffff7bf0000)
        librt.so.1 => /nix/store/1i8majcp529x3c54gindgs92aqi4d59y-glibc-2.40-66/lib/librt.so.1 (0x0000fffff7bc0000)
        libm.so.6 => /nix/store/1i8majcp529x3c54gindgs92aqi4d59y-glibc-2.40-66/lib/libm.so.6 (0x0000fffff7b10000)
        libc.so.6 => /nix/store/1i8majcp529x3c54gindgs92aqi4d59y-glibc-2.40-66/lib/libc.so.6 (0x0000fffff7940000)
        /nix/store/1i8majcp529x3c54gindgs92aqi4d59y-glibc-2.40-66/lib/ld-linux-aarch64.so.1 (0x0000fffff7fb0000)
        libpthread.so.0 => /nix/store/1i8majcp529x3c54gindgs92aqi4d59y-glibc-2.40-66/lib/libpthread.so.0 (0x0000fffff7910000)