TOUCH out/Release/obj.target/third_party/WebKit/Source/WebCore/WebCore.gyp/injected_webgl_script_source.stamp
  ACTION Generating InspectorOverlayPage.h from InspectorOverlayPage.html out/Release/obj/gen/webkit/InspectorOverlayPage.h
  TOUCH out/Release/obj.target/third_party/WebKit/Source/WebCore/WebCore.gyp/inspector_overlay_page.stamp
  ACTION Resolving [Supplemental=XXX] dependencies in all IDL files out/Release/obj/gen/supplemental_dependency.tmp
  TOUCH out/Release/obj.target/third_party/WebKit/Source/WebCore/WebCore.gyp/generate_supplemental_dependency.stamp
  ACTION Generating V8ArrayBufferViewCustomScript.h from V8ArrayBufferViewCustomScript.js out/Release/obj/gen/webkit/V8ArrayBufferViewCustomScript.h
  ACTION third_party_WebKit_Source_WebCore_WebCore_gyp_WebCore_gyp_webcore_bindings_sources_target_generateXMLViewerCSS out/Release/obj/gen/webkit/XMLViewerCSS.h
  ACTION third_party_WebKit_Source_WebCore_WebCore_gyp_WebCore_gyp_webcore_bindings_sources_target_generateXMLViewerJS out/Release/obj/gen/webkit/XMLViewerJS.h
  ACTION third_party_WebKit_Source_WebCore_WebCore_gyp_WebCore_gyp_webcore_bindings_sources_target_HTMLEntityTable out/Release/obj/gen/webkit/HTMLEntityTable.cpp
  ACTION third_party_WebKit_Source_WebCore_WebCore_gyp_WebCore_gyp_webcore_bindings_sources_target_CSSPropertyNames out/Release/obj/gen/webkit/CSSPropertyNames.cpp
sh: gperf: command not found
calling gperf failed: 32512 at /usr/ports/opt/chromium/work/src/chromium-23.0.1271.97/third_party/WebKit/Source/WebCore/css/makeprop.pl line 259.
Traceback (most recent call last):
  File "scripts/action_csspropertynames.py", line 174, in <module>
    sys.exit(main(sys.argv))
  File "scripts/action_csspropertynames.py", line 149, in main
    assert returnCode == 0
AssertionError
make: *** [out/Release/obj/gen/webkit/CSSPropertyNames.cpp] Error 1
=======> ERROR: Building '/usr/ports/opt/chromium/chromium#23.0.1271.97-1.pkg.tar.gz' failed.
prt-get: error while install

-- Packages where install failed
chromium