--- a/build/build.xml
+++ b/build/build.xml
@@ -21,8 +21,6 @@
                locale="en"/>
    </tstamp>
 
-   <property name="build.label" value="private-${_tmpstamp}"/>
-   <property name="build.vendor" value="${user.name}"/>
    <property name="hsqldb.title" value="HSQLDB"/>
    <property name="hsqldb.vendor" value="The HSQLDB Development Group"/>
    <property name="src" value="${basedir}/src"/>
@@ -481,8 +479,6 @@ examples:
              <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
              <attribute name='Implementation-Title'
                         value='Zaurus runtime'/>
-             <attribute name='Implementation-Version' value='${build.label}'/>
-             <attribute name='Implementation-Vendor' value='${build.vendor}'/>
          </manifest>
          <exclude name="org/hsqldb/jmx/**"/>
          <exclude name="org/hsqldb/util/*Transfer*.*"/>
@@ -528,8 +524,6 @@ examples:
              <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
              <attribute name='Implementation-Title'
                         value='Test runtime'/>
-             <attribute name='Implementation-Version' value='${build.label}'/>
-             <attribute name='Implementation-Vendor' value='${build.vendor}'/>
          </manifest>
          <exclude name="org/hsqldb/jmx/**"/>
          <exclude name="org/hsqldb/sample/*.*"/>
@@ -553,8 +547,6 @@ examples:
              <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
              <attribute name='Implementation-Title'
                         value='Runtime without utilities'/>
-             <attribute name='Implementation-Version' value='${build.label}'/>
-             <attribute name='Implementation-Vendor' value='${build.vendor}'/>
          </manifest>
          <exclude name="org/hsqldb/jmx/**"/>
          <exclude name="org/hsqldb/util/**"/>
@@ -580,8 +572,6 @@ examples:
              <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
              <attribute name='Implementation-Title'
                  value='Runtime without utilities and servers'/>
-             <attribute name='Implementation-Version' value='${build.label}'/>
-             <attribute name='Implementation-Vendor' value='${build.vendor}'/>
          </manifest>
          <exclude name="org/hsqldb/jdbc/jdbcStubs.class"/>
          <exclude name="org/hsqldb/jdbc/Array.class"/>
@@ -629,8 +619,6 @@ examples:
              <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
              <attribute name='Implementation-Title'
                         value='Standard runtime'/>
-             <attribute name='Implementation-Version' value='${build.label}'/>
-             <attribute name='Implementation-Vendor' value='${build.vendor}'/>
              <!-- This attribute is completely ignored unless the user
                   uses the jar like "java -jar .../hsqldb.jar" -->
              <attribute name='Main-Class' value='org.hsqldb.util.SqlTool'/>
@@ -740,8 +728,6 @@ examples:
              <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
              <attribute name='Implementation-Title'
                         value='JDBC client runtime'/>
-             <attribute name='Implementation-Version' value='${build.label}'/>
-             <attribute name='Implementation-Vendor' value='${build.vendor}'/>
           </manifest>
           <fileset refid='jdbcclasses'/>
         </jar>
@@ -756,8 +742,6 @@ examples:
                 <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
                 <attribute name='Implementation-Title'
                            value='SqlTool runtime, with JDBC driver'/>
-                <attribute name='Implementation-Version' value='${build.label}'/>
-                <attribute name='Implementation-Vendor' value='${build.vendor}'/>
                 <attribute name='Main-Class' value='org.hsqldb.util.SqlTool'/>
             </manifest>
             <!-- including 'org/hsqldb/jdbc*' just to be safe -->
@@ -776,7 +760,6 @@ examples:
                 <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
                 <attribute name='Implementation-Title'
                            value='HSQLDB Transfer Tool classes'/>
-                <attribute name='Implementation-Version' value='${build.label}'/>
                 <attribute name='Class-Path' value='hsqldb.jar'/>
                 <attribute name='Main-Class' value='org.hsqldb.util.DatabaseManagerSwing'/>
                 <!-- If we prefer to encourage use of Transfer instead of
@@ -805,8 +788,6 @@ examples:
              <attribute name='Specification-Vendor' value='${hsqldb.vendor}'/>
              <attribute name='Implementation-Title'
                         value='Utilities runtime, without JDBC driver'/>
-             <attribute name='Implementation-Version' value='${build.label}'/>
-             <attribute name='Implementation-Vendor' value='${build.vendor}'/>
              <!-- N.b. Blaine removed the Main-Class because this jar is
                   useless without a JDBC driver in the classpath, and you
                   can't add to classpath if invoked with "-jar" -->
