diff --git a/setup.sh b/setup.sh
index 403125c..262c33b 100644
--- a/setup.sh
+++ b/setup.sh
@@ -252,6 +252,8 @@ function copy_zpool_cache () {
 }
 
 function pacman_dl_parallel () {
+    # We're setting this in Arch Linux ISO CD while we install proper Arch.
+    # No need to revert this later as it is ephemeral anyway.
     sed -ri -e 's'$'\x1''^.*?(ParallelDownloads)[^\r\n\f]*'$'\x1''\1 = 20'$'\x1''g' '/etc/pacman.conf'
 }
 
@@ -263,6 +265,9 @@ function pacman_dont_check_space () {
     # overestimates required disk space. We instead assume an installation
     # gets done with at least a 10 GiB drive which is plenty. Skip pacman's
     # size check.
+    #
+    # We're setting this in Arch Linux ISO CD while we install proper Arch.
+    # No need to revert this later as it is ephemeral anyway.
     sed -ri -e 's'$'\x1''^.*?(CheckSpace)([^\r\n\f]*)'$'\x1''#\1\2'$'\x1''g' '/etc/pacman.conf'
 }