gistfile1.txt

o%                                                                                                                               ➜  ~  openssl ca                                                                                                               ~
The program ‘openssl’ is currently not installed. It is provided by
several packages. You can install it by typing one of the following:
  nix-env -iA nixos.libressl
  nix-env -iA nixos.libressl_2_3
  nix-env -iA nixos.openssl
  nix-env -iA nixos.openssl-chacha
  nix-env -iA nixos.openssl_1_0_1
  nix-env -iA nixos.openssl_1_1_0
➜  ~  nix-shell -p openssl                                                                                                     ~

[nix-shell:~]$ openssl ca
Using configuration from /nix/store/81n6pgrx7lq5f7cjajv82wa422ccvbv4-openssl-1.0.2j/etc/ssl/openssl.cnf
Error opening CA private key ./demoCA/private/cakey.pem
140081647246872:error:02001002:system library:fopen:No such file or directory:bss_file.c:402:fopen('./demoCA/private/cakey.pem','r')
140081647246872:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:404:
unable to load CA private key