diff --git a/fish/conf.d/nix.fish b/fish/conf.d/nix.fish
index 573a364..aa5ef71 100644
--- a/fish/conf.d/nix.fish
+++ b/fish/conf.d/nix.fish
@@ -1,10 +1,12 @@
-# https://github.com/NixOS/nix
+# Nix package manager
 #
-# If nix profile exists:
-#  - source the profile in bash
+# If Nix is installed:
+#  - source the profile with bash
 #  - export the NIX_* variables in fish
-#  - add nix profile to PATH
+#  - add Nix profile to PATH
 #
+# There is no fish profile to source yet.
+# https://github.com/NixOS/nix/issues/1512
 if test -f ~/.nix-profile/etc/profile.d/nix.sh
     for line in (bash -c 'source $0; for name in "${!NIX_@}"; do printf "%s=%s\n" "$name" "${!name}"; done' ~/.nix-profile/etc/profile.d/nix.sh)
         set -gx (string split -m 1 = $line)