diff --git a/package/alessandro/php/php.conf b/package/alessandro/php/php.conf
index 8188db004..8d57fab43 100644
--- a/package/alessandro/php/php.conf
+++ b/package/alessandro/php/php.conf
@@ -34,7 +34,7 @@ if [ "$ROCKCFG_PKG_PHP_mysql" = 1 ] ; then
 	var_append extraconfopt " " "--with-mysql$pkg_php_shared"
 fi
 
-[ "$ROCKCFG_PKG_PHP_postgresql" = 1 ] && var_append extraconfopt " " "--with-pgsql"
+[ "$ROCKCFG_PKG_PHP_postgresql" = 1 ] && var_append extraconfopt " " "--with-pgsql=${pkg_postgresql_prefix}"
 [ "$ROCKCFG_PKG_PHP_openldap" = 1 ] && var_append extraconfopt " " "--with-ldap=${pkg_openldap_prefix}"
 [ "$ROCKCFG_PKG_PHP_openssl" = 1 ] && var_append extraconfopt " " "--with-openssl"
 
diff --git a/package/michiel/postgresql/postgresql.conf b/package/michiel/postgresql/postgresql.conf
index 30df31e39..fbe4f60ca 100644
--- a/package/michiel/postgresql/postgresql.conf
+++ b/package/michiel/postgresql/postgresql.conf
@@ -28,3 +28,7 @@ fi
 var_append extraconfopt " " "--with-CXX"
 var_append extraconfopt " " "--with-gnu-ld"
 var_append extraconfopt " " "--with-perl"
+
+# other packages may need to know where postgres is.
+hook_add postmake 3 "echo \"pkg_postgresql_prefix=/$prefix\" \
+        > $root/var/adm/parse-config/postgresql"