Derive project base directory based on phing file location

build.xml

@@ -85,7 +85,7 @@ This documentation has been generated by
 [phrocco](https://github.com/oneblackbear/phrocco)
 - a PHP port of the literate documentation generator Docco. -->
 
-<project name="phing-drupal" default="build" basedir=".">
+<project name="phing-drupal" default="build">
 
 <!-- ## Main targets -->
 
@@ -752,6 +752,12 @@ You can create your own properties file by copying the
 `build.default.properties` file to the root directory, rename it
 `build.properties` and modify it according to your project. -->
   <target name="load-properties">
+    <php function="dirname" returnProperty="phing.dir">
+      <param value="${phing.file}"/>
+    </php>
+
+    <property name="project.basedir" value="${phing.dir}" />
+
     <!-- Use condition instead of unless property as we cannot unset properties in Phing -->
     <if>
       <or>
@@ -771,10 +777,8 @@ root directory. -->
                project root directory -->
           <available file="${project.basedir}/../build.properties"/>
           <then>
-            <property name="project.basedir" value="${project.basedir}/../"
-                      override="true"/>
             <resolvepath propertyName="project.basedir"
-                         file="${project.basedir}"/>
+                         file="${project.basedir}/../"/>
           </then>
         </if>
 
@@ -784,9 +788,6 @@ root directory. -->
                   value="${phing.dir}/build.default.properties" />
         <!-- Allow override using `build.properties` in build file
              directory -->
-        <php function="dirname" returnProperty="phing.dir">
-          <param value="${phing.file}"/>
-        </php>
         <available file="${phing.dir}/build.properties"
                    property="project.properties.file"
                    value="${phing.dir}/build.properties" />