diff --git a/doerg/doerg-tex/.gitignore b/doerg/doerg-tex/.gitignore
deleted file mode 100644
index d366d2e..0000000
--- a/doerg/doerg-tex/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-classes
\ No newline at end of file
diff --git a/doerg/doerg-tex/compile.clj b/doerg/doerg-tex/compile.clj
deleted file mode 100644
index 13f96d1..0000000
--- a/doerg/doerg-tex/compile.clj
+++ /dev/null
@@ -1,2 +0,0 @@
-(compile 'serialise)
-(compile 'deserialise)
diff --git a/doerg/doerg-tex/deserialise.clj b/doerg/doerg-tex/deserialise.clj
index e3be265..cb0011c 100644
--- a/doerg/doerg-tex/deserialise.clj
+++ b/doerg/doerg-tex/deserialise.clj
@@ -1,7 +1,5 @@
 (ns deserialise
   (:require [clj-cbor.core :as cbor]
-            [clojure.string :as str])
-  (:gen-class))
+            [clojure.string :as str]))
 
-(defn -main []
-  (prn (cbor/decode cbor/default-codec System/in :eof)))
+(prn (cbor/decode cbor/default-codec System/in :eof))
diff --git a/doerg/doerg-tex/serialise.clj b/doerg/doerg-tex/serialise.clj
index 207766f..417a648 100644
--- a/doerg/doerg-tex/serialise.clj
+++ b/doerg/doerg-tex/serialise.clj
@@ -1,7 +1,6 @@
 (ns serialise
   (:require [clj-cbor.core :as cbor]
-            [clojure.string :as str])
-  (:gen-class))
+            [clojure.string :as str]))
 
 (defn w [x]
   (cbor/encode cbor/default-codec System/out x))
@@ -12,13 +11,9 @@
 #_
 (w "\\naturalto")
 
-(defn -main []
-  (w "\\begin{align*}
-x &= y
-\\\\ &= zzz
-\\end{align*}")
+(w "\\ifxetex blah \\fi")
 
-  #_#_#_
-  (w "c = \\sqrt{a^2 + y^2}")
-  (w "c = \\sqrt{a^ + y^2")
-  (w "\\alpha^\\beta"))
+#_#_#_
+(w "c = \\sqrt{a^2 + y^2}")
+(w "c = \\sqrt{a^ + y^2")
+(w "\\alpha^\\beta")
diff --git a/doerg/resources/net/deertopia/doerg/preview-template.tex b/doerg/resources/net/deertopia/doerg/preview-template.tex
index 6761074..a7c93db 100644
--- a/doerg/resources/net/deertopia/doerg/preview-template.tex
+++ b/doerg/resources/net/deertopia/doerg/preview-template.tex
@@ -2,6 +2,7 @@
 \usepackage{amsmath}
 \usepackage[active,tightpage,auctex,dvips]{preview}
 \usepackage{fontspec}
+\usepackage{ifxetex}
 %% \usepackage{syd-plex}
 
 \begin{document}
diff --git a/doerg/src/net/deertopia/doerg/render.clj b/doerg/src/net/deertopia/doerg/render.clj
index a11abd9..1216e07 100644
--- a/doerg/src/net/deertopia/doerg/render.clj
+++ b/doerg/src/net/deertopia/doerg/render.clj
@@ -127,6 +127,13 @@
                      element/footnotes-section?]
                     sp/NONE))))
 
+(defn- collect-latex-headers [doc]
+  (->> doc
+       (sp/select
+        [element/postorder-walker
+         #(element/of-keyword-type? % "LATEX_HEADER")
+         (sp/view :value)])))
+
 (defn- read-and-patch-generated-svg [{:keys [file height depth]}]
   ;; dvisvgm writes standalone SVG files, to which we need to make a
   ;; few changes to use them inline within our HTML.
@@ -139,15 +146,19 @@
   ;;     the SVG tag, and set the new values for height and
   ;;     vertical-align in the style attribute
   ;;   • Viewbox: Must be removed entirely for correct positioning.
-  (-> (slurp file)
-      (str/replace-first "<?xml version='1.0' encoding='UTF-8'?>" "")
-      (str/replace-first #" height=['\"][^\"']+[\"']" "")
-      (str/replace-first #" width=['\"][^\"']+[\"']" "")
-      (str/replace-first
-       #"viewBox=['\"][^\"']+[\"']"
-       (format "style=\"%s\""
-               (format "height:%.4fem;vertical-align:%.4f;display:inline-block"
-                       height (- depth))))))
+  (let [r (-> (slurp file)
+              (str/replace-first "<?xml version='1.0' encoding='UTF-8'?>" "")
+              (str/replace-first #" height=['\"][^\"']+[\"']" "")
+              (str/replace-first #" width=['\"][^\"']+[\"']" "")
+              (str/replace-first
+               #"viewBox=['\"][^\"']+[\"']"
+               (fn [s]
+                 (format "%s style=\"%s\""
+                         s
+                         (format "height:%.4fem;vertical-align:%.4fem;display:inline-block"
+                                 height (- depth))))))]
+    (spit (fs/file "/tmp" (fs/file-name file)) r)
+    r))
 
 (defn- render-tex-snippets [doc]
   (let [promises (atom [])
@@ -181,7 +192,10 @@
                        (catch Exception e
                          (prn e)
                          (flush)
-                         (throw e)))))))]
+                         (throw e))))
+                (when (fs/exists? "/tmp/doerg-svgs")
+                  (fs/delete-tree "/tmp/doerg-svgs"))
+                (fs/copy-tree svg-dir "/tmp/doerg-svgs"))))]
     (future-call (bound-fn* f))
     r))
 
@@ -331,19 +345,12 @@
   (str "@" key))
 
 (defmethod org-element "latex-fragment" [{:keys [contents value] :as e}]
-  (let [display? (str/starts-with? value "\\[")]
-    [:span.latex-fragment
-     (-> e ::rendered (deref 2000 "«timed out»"))]
-    #_
-    [:span.latex-fragment
-     (hiccup/raw (tex/render-temml contents :display? display?))]))
+  [:span.latex-fragment
+   (-> e ::rendered (deref 2000 "«timed out»"))])
 
 (defmethod org-element "latex-environment" [{:keys [value] :as e}]
   [:span.latex-fragment
-   (-> e ::rendered (deref 2000 "«timed out»"))]
-  #_
-  [:span.latex-fragment
-   (hiccup/raw (tex/render-temml value :display? true))])
+   (-> e ::rendered (deref 2000 "«timed out»"))])
 
 (defmethod org-element "example-block" [{:keys [value]}]
   [:pre value])
@@ -362,7 +369,6 @@
 ;; Completely ignore the LATEX_COMPILER keyword.
 (defmethod org-keyword "LATEX_COMPILER" [_] nil)
 
-;; TODO: Real LatEx support.
 (defmethod org-keyword "LATEX_HEADER" [_] nil)
 
 ;; Not sure how to deal with this one yet.