diff --git a/ci/OWNERS b/ci/OWNERS
index e4aeeaa6db6b..0d1cdb3919cf 100644
--- a/ci/OWNERS
+++ b/ci/OWNERS
@@ -26,13 +26,19 @@
 
 # Libraries
 /lib                        @infinisil @hsjobeki
-/lib/systems                @alyssais @ericson2314 @NixOS/stdenv
 /lib/generators.nix         @infinisil @hsjobeki @Profpatsch
 /lib/cli.nix                @infinisil @hsjobeki @Profpatsch
 /lib/debug.nix              @infinisil @hsjobeki @Profpatsch
 /lib/asserts.nix            @infinisil @hsjobeki @Profpatsch
 /lib/path/*                 @infinisil @hsjobeki
 /lib/fileset                @infinisil @hsjobeki
+## Standard environment–related libraries
+/lib/customisation.nix      @alyssais @NixOS/stdenv
+/lib/derivations.nix        @alyssais @NixOS/stdenv
+/lib/fetchers.nix           @alyssais @NixOS/stdenv
+/lib/meta.nix               @alyssais @NixOS/stdenv
+/lib/source-types.nix       @alyssais @NixOS/stdenv
+/lib/systems                @alyssais @NixOS/stdenv
 ## Libraries / Module system
 /lib/modules.nix            @infinisil @roberth @hsjobeki
 /lib/types.nix              @infinisil @roberth @hsjobeki