Install the pear command under the bin_dir setting intead of the fixed

PHP_BINDIR

pear/package-PEAR.xml

@@ -72,7 +72,7 @@
       </dir>
       <dir name="scripts">
         <file baseinstalldir="/" role="script" install-as="pear" name="pear.in">
-          <replace from="@prefix@/bin" to="PHP_BINDIR" type="php-const"/>
+          <replace from="@prefix@/bin" to="bin_dir" type="pear-config"/>
           <replace from="@pear_version@" to="version" type="package-info"/>
           <replace from="@include_path@" to="php_dir" type="pear-config"/>
         </file>