LDFLAGS

export LDFLAGS="-L/Users/MY_USER/brew/opt/[email protected]/lib"

For pkg-config to find [email protected] you may need to set:
  export PKG_CONFIG_PATH="/Users/el/brew/opt/[email protected]/lib/pkgconfig"

set -gx LDFLAGS
fish_add_path

See also

• pkg-config, LDFLAGS
• set -x