FIxed files not being published

package.nix

@@ -5,31 +5,37 @@
 }: let
   src = ./.;
   buildScript = writeText "build-site.el" ''
-        ;; Load the publishing system
-        (require 'ox-publish)
-        ;; Define the publishing project
-        (setq org-publish-project-alist
-              (list
-               (list "kylekrein's website"
-                     :recursive t
-                     :base-directory "${src}"
-                     :publishing-directory "./public"
-                     :publishing-function 'org-html-publish-to-html
-    		 :with-author nil           ;; Don't include author name
-                 :with-creator t            ;; Include Emacs and Org versions in footer
-                 :with-toc nil                ;; Include a table of contents
-                 :section-numbers nil       ;; Don't include section numbers
-                 :time-stamp-file nil)))    ;; Don't include time stamp in file
+         ;; Load the publishing system
+         (require 'ox-publish)
+         ;; Define the publishing project
+         (setq org-publish-project-alist
+               (list
+                (list "kylekrein's website"
+                      :recursive t
+                      :base-directory "${src}"
+                      :publishing-directory "./public"
+                      :publishing-function 'org-html-publish-to-html
+     		 :with-author nil           ;; Don't include author name
+                  :with-creator t            ;; Include Emacs and Org versions in footer
+                  :with-toc nil                ;; Include a table of contents
+                  :section-numbers nil       ;; Don't include section numbers
+                  :time-stamp-file nil)
+    (list "attachments"
+    :recursive t
+          :base-directory "${src}"
+          :base-extension "jpg\\|gif\\|png\\|css"
+          :publishing-directory "./public"
+          :publishing-function 'org-publish-attachment)))    ;; Don't include time stamp in file
 
-    ;; Customize the HTML output
-    (setq org-html-validation-link nil            ;; Don't show validation link
-          org-html-head-include-scripts nil       ;; Use our own scripts
-          org-html-head-include-default-style nil ;; Use our own styles
-          org-html-head "<link rel=\"stylesheet\" href=\"https://cdn.simplecss.org/simple.min.css\" />")
+     ;; Customize the HTML output
+     (setq org-html-validation-link nil            ;; Don't show validation link
+           org-html-head-include-scripts nil       ;; Use our own scripts
+           org-html-head-include-default-style nil ;; Use our own styles
+           org-html-head "<link rel=\"stylesheet\" href=\"https://cdn.simplecss.org/simple.min.css\" />")
 
-        ;; Generate the site output
-        (org-publish-all t)
-        (message "Build complete!")
+         ;; Generate the site output
+         (org-publish-all t)
+         (message "Build complete!")
   '';
 in
   stdenvNoCC.mkDerivation {
@@ -40,7 +46,6 @@ in
     '';
     installPhase = ''
       mkdir -p $out
-      cp ${./style.css} $out/style.css
       cd public
       cp -r . $out/
     '';