diff --git a/src/packages.lisp b/src/packages.lisp
index c6755a5..a9a3786 100644
--- a/src/packages.lisp
+++ b/src/packages.lisp
@@ -7,6 +7,10 @@
   (:import-from :cl-fad #:file-exists-p)
   (:import-from :closure-template #:compile-template)
   (:import-from :local-time #:format-rfc1123-timestring)
+  (:import-from :uiop #:getcwd
+                      #:chdir
+                      #:ensure-directory-pathname
+                      #:directory-exists-p)
   (:export #:main
            #:preview
            #:*config*
diff --git a/src/util.lisp b/src/util.lisp
index ebafe4e..1811bde 100644
--- a/src/util.lisp
+++ b/src/util.lisp
@@ -30,33 +30,28 @@ BODY on files that match the given extension."
                                         #',extension-p
                                         (constantly t))))))
 
+(define-condition directory-does-not-exist (error)
+  ((directory :initarg dir :reader dir))
+  (:report (lambda (c stream)
+             (format stream "The directory '~A' does not exist" (dir c)))))
+
+(defun (setf getcwd) (path)
+  "Change the operating system's current directory to PATH."
+  (setf path (ensure-directory-pathname path))
+  (or (and (directory-exists-p path)
+           (chdir path))
+      (error 'directory-does-not-exist :dir path))
+  path)
+
 (defmacro with-current-directory (path &body body)
   "Change the current directory to PATH and execute BODY in
 an UNWIND-PROTECT, then change back to the current directory."
   (alexandria:with-gensyms (old)
-    `(let ((,old (current-directory)))
+    `(let ((,old (getcwd)))
        (unwind-protect (progn
-                         (setf (current-directory) ,path)
+                         (setf (getcwd) ,path)
                          ,@body)
-         (setf (current-directory) ,old)))))
-
-(defun current-directory ()
-  "Return the operating system's current directory."
-  #+sbcl (sb-posix:getcwd)
-  #+ccl (ccl:current-directory)
-  #+ecl (si:getcwd)
-  #+cmucl (unix:unix-current-directory)
-  #+clisp (ext:cd)
-  #-(or sbcl ccl ecl cmucl clisp) (error "Not implemented yet."))
-
-(defun (setf current-directory) (path)
-  "Change the operating system's current directory to PATH."
-  #+sbcl (sb-posix:chdir path)
-  #+ccl (setf (ccl:current-directory) path)
-  #+ecl (si:chdir path)
-  #+cmucl (unix:unix-chdir (namestring path))
-  #+clisp (ext:cd path)
-  #-(or sbcl ccl ecl cmucl clisp) (error "Not implemented yet."))
+         (setf (getcwd) ,old)))))
 
 (defun exit ()
   "Exit the lisp system returning a 0 status code."
diff --git a/themes/hyde/post.tmpl b/themes/hyde/post.tmpl
index cebe759..8400fcb 100644
--- a/themes/hyde/post.tmpl
+++ b/themes/hyde/post.tmpl
@@ -6,7 +6,7 @@
   <div class="tags">{\n}
     {if $post.tags}
       Tagged as {foreach $tag in $post.tags}
-        <a href="../tag/{$tag.slug}.{$config.pageExt}">{$tag.name}</a>{nil}
+        <a href="{$config.domain}/tag/{$tag.slug}.{$config.pageExt}">{$tag.name}</a>{nil}
           {if not isLast($tag)},{sp}{/if}
       {/foreach}
     {/if}
diff --git a/themes/readable/post.tmpl b/themes/readable/post.tmpl
index b655ce7..d2789ea 100644
--- a/themes/readable/post.tmpl
+++ b/themes/readable/post.tmpl
@@ -6,7 +6,7 @@
   <p>
     {if $post.tags}
       Tagged as {foreach $tag in $post.tags}
-        <a href="../tag/{$tag.slug}{$config.pageExt}">{$tag.name}</a>{nil}
+        <a href="{$config.domain}/tag/{$tag.slug}{$config.pageExt}">{$tag.name}</a>{nil}
           {if not isLast($tag)},{sp}{/if}
       {/foreach}
     {/if}