diff --git a/doerg/default.nix b/doerg/default.nix
index e743654..e10fdb9 100644
--- a/doerg/default.nix
+++ b/doerg/default.nix
@@ -31,15 +31,13 @@ let
     doerg-temml-worker
   ];
 
-  doerg-config = writeText "doerg-config.edn" ''
-    tee $out <<EOF
+  doerg-config = writeText "doerg-extra-config.edn" ''
     #:net.deertopia.doerg
     {:ibm-plex-web "${ibm-plex-web}"
      :latex "${lib.getExe' our-tex "xelatex"}"
-     :dvisvgm "${lib.getExe' our-tex "xelatex"}"
+     :dvisvgm "${lib.getExe' our-tex "dvisvgm"}"
      :doerg-temml-worker "${lib.getExe doerg-temml-worker}"
      :doerg-parser "${lib.getExe doerg-parser}"}
-    EOF
   '';
 in mkCljBin' {
   name = "net.deertopia/doerg";
@@ -63,7 +61,9 @@ in mkCljBin' {
     plex
     our-tex
   ];
-  java-opts = [ "-Dnet.deertopia.doerg.config=${doerg-config}" ];
+  preBuild = ''
+    cp ${doerg-config} resources/net/deertopia/doerg/extra-config.edn
+  '';
   doCheck = true;
   checkPhase = ''
     clojure -M:test
diff --git a/doerg/resources/net/deertopia/doerg/config.edn b/doerg/resources/net/deertopia/doerg/default-config.edn
similarity index 100%
rename from doerg/resources/net/deertopia/doerg/config.edn
rename to doerg/resources/net/deertopia/doerg/default-config.edn
diff --git a/doerg/src/net/deertopia/doerg/config.clj b/doerg/src/net/deertopia/doerg/config.clj
index 8f68d52..b4d900d 100644
--- a/doerg/src/net/deertopia/doerg/config.clj
+++ b/doerg/src/net/deertopia/doerg/config.clj
@@ -21,7 +21,11 @@
 
 (s/def ::d/executable
   (s/conformer
-   #(or (some-> (fs/which %) fs/file)
+   ;; I'd love to use `fs/which` here, but it's fairly problematic to
+   ;; check `fs/executable?` at… build time (which `fs/which` does)?
+   ;; Wait… what?  Do I know how Clojure compilation works?
+   #(or #_(some-> % fs/expand-home fs/which fs/file)
+        (some-> % fs/expand-home fs/file)
         ::s/invalid)))
 
 (s/def ::d/ibm-plex-web ::d/directory)
@@ -58,13 +62,12 @@
 (def read-config (make-read-config ::d/config))
 
 (def default
-  (let [r (-> "net/deertopia/doerg/config.edn"
-              io/resource
-              (read-config (System/getProperty "net.deertopia.doerg.config")
-                           (System/getenv "DOERG_CONFIG")))]
-    (if (s/invalid? r)
-      (throw (IllegalArgumentException.
-              "default config is bad!"))
-      r)))
+  (read-config
+   ;; Default config.
+   (io/resource "net/deertopia/doerg/default-config.edn")
+   ;; Defaults set at build time, if any.
+   (io/resource "net/deertopia/doerg/extra-config.edn")
+   ;; Config set at runtime.
+   (System/getenv "DOERG_CONFIG")))
 
 (def ^:dynamic *cfg* default)
diff --git a/publisher/override_deps.bb b/publisher/override_deps.bb
index d6ebe39..afcbc4f 100644
--- a/publisher/override_deps.bb
+++ b/publisher/override_deps.bb
@@ -20,8 +20,9 @@
   (loop [os (seq overrides)
          loc zloc]
     (if-some [[[k v] & xs] os]
-      (do (printf "override dep %s with %s\n"
-                  (pr-str k) (pr-str v))
+      (do (binding [*out* *err*]
+            (printf "override dep %s with %s\n"
+                    (pr-str k) (pr-str v)))
           (recur xs (z/assoc loc k v)))
       loc)))