This patch make Xfce use "gnome" as the default icon theme and enable font antialias.

Taken from ArchLinux.

diff -upr xfce4-settings-4.12.0.orig/xfsettingsd/xsettings.xml xfce4-settings-4.12.0/xfsettingsd/xsettings.xml
--- xfce4-settings-4.12.0.orig/xfsettingsd/xsettings.xml	2015-02-24 03:33:11.000000000 +0200
+++ xfce4-settings-4.12.0/xfsettingsd/xsettings.xml	2015-03-01 09:52:24.376869688 +0200
@@ -6,8 +6,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <channel name="xsettings" version="1.0">
   <property name="Net" type="empty">
     <property name="ThemeName" type="empty"/>
-    <property name="IconThemeName" type="empty"/>
+    <property name="IconThemeName" type="string" value="gnome"/>
     <property name="DoubleClickTime" type="int" value="400"/>
     <property name="DoubleClickDistance" type="int" value="5"/>
     <property name="DndDragThreshold" type="int" value="8"/>
@@ -19,9 +19,9 @@
   </property>
   <property name="Xft" type="empty">
     <property name="DPI" type="empty"/>
-    <property name="Antialias" type="int" value="-1"/>
+    <property name="Antialias" type="int" value="1"/>
     <property name="Hinting" type="int" value="-1"/>
-    <property name="HintStyle" type="string" value="hintnone"/>
+    <property name="HintStyle" type="string" value="hintfull"/>
     <property name="RGBA" type="string" value="none"/>
     <!-- <property name="Lcdfilter" type="string" value="none"/> -->
   </property>
ff/gnu/packages/sqlite.scm?id=0dd03c4c0da0a3876e4eb893113b3ce5b5a188fe'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/sqlite.scm'>
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<div class='path'>path: <a href='/guix/log/?id=0dd03c4c0da0a3876e4eb893113b3ce5b5a188fe'>root</a>/<a href='/guix/log/gnu?id=0dd03c4c0da0a3876e4eb893113b3ce5b5a188fe'>gnu</a>/<a href='/guix/log/gnu/packages?id=0dd03c4c0da0a3876e4eb893113b3ce5b5a188fe'>packages</a>/<a href='/guix/log/gnu/packages/sqlite.scm?id=0dd03c4c0da0a3876e4eb893113b3ce5b5a188fe'>sqlite.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/sqlite.scm?id=0dd03c4c0da0a3876e4eb893113b3ce5b5a188fe&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-12-06 11:14:54 +0000'>2022-12-06</span></td><td><a href='/guix/commit/gnu/packages/sqlite.scm?id=b0feb36e832b671588ddc7538096e6f0a4555cd5'>gnu: sqlite-next: Update to 3.40.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/sqlite.scm (sqlite-next): Update to 3.40.0.

Signed-off-by: Christopher Baines &lt;mail@cbaines.net&gt;
</span></span></td><td>Matthew James Kraai</td></tr>