scons --d --usev8 mongod

i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_compile.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_newline.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_ord2utf8.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_version.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_valid_utf8.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_get.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_tables.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_ucp_searchfuncs.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_config.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_refcount.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcreposix.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_dfa_exec.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_try_flipped.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_fullinfo.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_study.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_exec.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_xclass.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_globals.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_info.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_maketables.o: No such file or directory
i686-apple-darwin11-llvm-g++-4.2: build/darwin/d/usev8/third_party/pcre-7.4/pcre_chartables.o: No such file or directory