diff --git a/Makefile.am b/Makefile.am
index 4c278ba..0eaca96 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -18,6 +18,10 @@
 #  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 #  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+# During distcheck, system locations (as provided by pkg-config) may
+# not be writable; provide instead relative locations.
+DISTCHECK_CONFIGURE_FLAGS = --with-xorg-module-dir='$${libdir}/xorg/modules'
+
 SUBDIRS = src man
 MAINTAINERCLEANFILES = ChangeLog INSTALL
 
diff --git a/configure.ac b/configure.ac
index 0e970f2..5f3d457 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,9 +46,12 @@ LT_INIT([disable-static])
 AH_TOP([#include "xorg-server.h"])
 
 # Define a configure option for an alternate module directory
-AC_ARG_WITH(xorg-module-dir, [  --with-xorg-module-dir=DIR ],
-                             [ moduledir="$withval" ],
-                             [ moduledir="$libdir/xorg/modules" ])
+PKG_PROG_PKG_CONFIG([0.25])
+AC_ARG_WITH(xorg-module-dir,
+            AS_HELP_STRING([--with-xorg-module-dir=DIR],
+                           [Default xorg module directory]),
+            [moduledir="$withval"],
+            [moduledir=`$PKG_CONFIG --variable=moduledir xorg-server`])
 AC_SUBST(moduledir)