<leira>
I tried to add line "export NIX_PATH=$HOME/.nix-defexpr/channels${NIX_PATH:+:}$NIX_PATH" into programs.bash.profileExtra, home-manager complained error: syntax error, unexpected '+', at /Users/leira/.config/nixpkgs/home.nix:33:61
<leira>
I wonder, is there any way to properly escape the '+'?