I get this error when trying to install zlib: Error: Target com.apple.destroot returned: invalid command name "command_exec" Below is the full debug, I would appreciate a clue: sudo port -d install zlibDEBUG: Found port in file:///opt/local/var/db/dports/sources/rsync.rsync.darwinports.org_dpupdate_dports/archivers/zlib DEBUG: Changing to port directory: /opt/local/var/db/dports/sources/rsync.rsync.darwinports.org_dpupdate_dports/archivers/zlib DEBUG: Requested variant darwin is not provided by port zlib. DEBUG: Requested variant i386 is not provided by port zlib. DEBUG: Requested variant macosx is not provided by port zlib. DEBUG: Executing com.apple.main (zlib) ---> Fetching zlib DEBUG: Executing com.apple.fetch (zlib) ---> zlib-1.2.3.tar.bz2 doesn't seem to exist in /opt/local/var/db/dports/distfiles/zlib ---> Attempting to fetch zlib-1.2.3.tar.bz2 from http://www.zlib.net/ % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 415k 100 415k 0 0 80058 0 0:00:05 0:00:05 --:--:-- 139k ---> Verifying checksum(s) for zlib DEBUG: Executing com.apple.checksum (zlib) ---> Checksumming zlib-1.2.3.tar.bz2 DEBUG: Correct (md5) checksum for zlib-1.2.3.tar.bz2 DEBUG: setting option extract.cmd to /usr/bin/bzip2 ---> Extracting zlib DEBUG: Executing com.apple.extract (zlib) ---> Extracting zlib-1.2.3.tar.bz2 DEBUG: setting option extract.args to /opt/local/var/db/dports/distfiles/zlib/zlib-1.2.3.tar.bz2 DEBUG: Assembled command: 'cd "/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work" && /usr/bin/bzip2 -dc /opt/local/var/db/dports/distfiles/zlib/zlib- 1.2.3.tar.bz2 | /usr/bin/gnutar --no-same-owner -xf -' DEBUG: Executing com.apple.patch (zlib) ---> Configuring zlib DEBUG: Executing com.apple.configure (zlib) DEBUG: Assembled command: 'cd "/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/zlib- 1.2.3" && ./configure --prefix=/opt/local --shared' Checking for gcc... Checking for shared library support... Building shared library libz.1.2.3.dylib with gcc. Checking for unistd.h... Yes. Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf() Checking for vsnprintf() in stdio.h... Yes. Checking for return value of vsnprintf()... Yes. Checking for errno.h... Yes. Checking for mmap support... Yes. DEBUG: Executing proc-post-com.apple.configure-configure-0 ---> Building zlib with target all DEBUG: Executing com.apple.build (zlib) DEBUG: Assembled command: 'cd "/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/zlib- 1.2.3" && make all' gcc -fPIC -O3 -DUSE_MMAP -c -o example.o example.c gcc -fPIC -O3 -DUSE_MMAP -c -o adler32.o adler32.c gcc -fPIC -O3 -DUSE_MMAP -c -o compress.o compress.c gcc -fPIC -O3 -DUSE_MMAP -c -o crc32.o crc32.c gcc -fPIC -O3 -DUSE_MMAP -c -o gzio.o gzio.c gcc -fPIC -O3 -DUSE_MMAP -c -o uncompr.o uncompr.c gcc -fPIC -O3 -DUSE_MMAP -c -o deflate.o deflate.c gcc -fPIC -O3 -DUSE_MMAP -c -o trees.o trees.c gcc -fPIC -O3 -DUSE_MMAP -c -o zutil.o zutil.c gcc -fPIC -O3 -DUSE_MMAP -c -o inflate.o inflate.c gcc -fPIC -O3 -DUSE_MMAP -c -o infback.o infback.c gcc -fPIC -O3 -DUSE_MMAP -c -o inftrees.o inftrees.c gcc -fPIC -O3 -DUSE_MMAP -c -o inffast.o inffast.c gcc -dynamiclib -install_name /opt/local/lib/libz.1.dylib -compatibility_version 1 -current_version 1.2.3 -o libz.1.2.3.dylib adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o zutil.o inflate.o infback.o inftrees.o inffast.o rm -f libz.dylib libz.1.dylib ln -s libz.1.2.3.dylib libz.dylib ln -s libz.1.2.3.dylib libz.1.dylib gcc -fPIC -O3 -DUSE_MMAP -o example example.o -L. libz.1.2.3.dylib gcc -fPIC -O3 -DUSE_MMAP -c -o minigzip.o minigzip.c gcc -fPIC -O3 -DUSE_MMAP -o minigzip minigzip.o -L. libz.1.2.3.dylib ---> Staging zlib into destroot . changed gid expected 0 found 80 modified permissions expected 0775 found 0755 modified ./usr missing (created) . missing (directory not created: File exists) ./Applications missing (created) ./Developer missing (created) ./Library missing (created) . changed gid expected 80 found 0 modified permissions expected 0775 found 0755 modified ./bin missing (created) ./etc missing (created) ./include missing (created) ./lib missing (created) ./libexec missing (created) ./sbin missing (created) ./share missing (created) ./share/info missing (created) ./share/man missing (created) ./share/man/cat1 missing (created) ./share/man/cat2 missing (created) ./share/man/cat3 missing (created) ./share/man/cat4 missing (created) ./share/man/cat5 missing (created) ./share/man/cat6 missing (created) ./share/man/cat7 missing (created) ./share/man/cat8 missing (created) ./share/man/cat9 missing (created) ./share/man/catl missing (created) ./share/man/catn missing (created) ./share/man/man1 missing (created) ./share/man/man2 missing (created) ./share/man/man3 missing (created) ./share/man/man4 missing (created) ./share/man/man5 missing (created) ./share/man/man6 missing (created) ./share/man/man7 missing (created) ./share/man/man8 missing (created) ./share/man/man9 missing (created) ./share/man/manl missing (created) ./share/man/mann missing (created) ./share/nls missing (created) ./share/nls/C missing (created) ./share/nls/af_ZA.ISO8859-1 missing (created) ./share/nls/af_ZA.ISO8859-15 missing (created) ./share/nls/bg_BG.CP1251 missing (created) ./share/nls/cs_CZ.ISO8859-2 missing (created) ./share/nls/da_DK.ISO8859-1 missing (created) ./share/nls/da_DK.ISO8859-15 missing (created) ./share/nls/de_AT.ISO8859-1 missing (created) ./share/nls/de_AT.ISO8859-15 missing (created) ./share/nls/de_CH.ISO8859-1 missing (created) ./share/nls/de_CH.ISO8859-15 missing (created) ./share/nls/de_DE.ISO8859-1 missing (created) ./share/nls/de_DE.ISO8859-15 missing (created) ./share/nls/el_GR.ISO8859-7 missing (created) ./share/nls/en_AU.ISO8859-1 missing (created) ./share/nls/en_AU.ISO8859-15 missing (created) ./share/nls/en_AU.US-ASCII missing (created) ./share/nls/en_CA.ISO8859-1 missing (created) ./share/nls/en_CA.ISO8859-15 missing (created) ./share/nls/en_CA.US-ASCII missing (created) ./share/nls/en_GB.ISO8859-1 missing (created) ./share/nls/en_GB.ISO8859-15 missing (created) ./share/nls/en_GB.US-ASCII missing (created) ./share/nls/en_NZ.ISO8859-1 missing (created) ./share/nls/en_NZ.ISO8859-15 missing (created) ./share/nls/en_NZ.US-ASCII missing (created) ./share/nls/en_US.ISO8859-1 missing (created) ./share/nls/en_US.ISO8859-15 missing (created) ./share/nls/es_ES.ISO8859-1 missing (created) ./share/nls/es_ES.ISO8859-15 missing (created) ./share/nls/et_EE.ISO8859-15 missing (created) ./share/nls/fi_FI.ISO8859-1 missing (created) ./share/nls/fi_FI.ISO8859-15 missing (created) ./share/nls/fr_BE.ISO8859-1 missing (created) ./share/nls/fr_BE.ISO8859-15 missing (created) ./share/nls/fr_CA.ISO8859-1 missing (created) ./share/nls/fr_CA.ISO8859-15 missing (created) ./share/nls/fr_CH.ISO8859-1 missing (created) ./share/nls/fr_CH.ISO8859-15 missing (created) ./share/nls/fr_FR.ISO8859-1 missing (created) ./share/nls/fr_FR.ISO8859-15 missing (created) ./share/nls/hi_IN.ISCII-DEV missing (created) ./share/nls/hr_HR.ISO8859-2 missing (created) ./share/nls/hu_HU.ISO8859-2 missing (created) ./share/nls/is_IS.ISO8859-1 missing (created) ./share/nls/is_IS.ISO8859-15 missing (created) ./share/nls/it_CH.ISO8859-1 missing (created) ./share/nls/it_CH.ISO8859-15 missing (created) ./share/nls/it_IT.ISO8859-1 missing (created) ./share/nls/it_IT.ISO8859-15 missing (created) ./share/nls/ja_JP.SJIS missing (created) ./share/nls/ja_JP.eucJP missing (created) ./share/nls/ko_KR.eucKR missing (created) ./share/nls/la_LN.ISO8859-1 missing (created) ./share/nls/la_LN.ISO8859-15 missing (created) ./share/nls/la_LN.ISO8859-2 missing (created) ./share/nls/la_LN.ISO8859-4 missing (created) ./share/nls/la_LN.US-ASCII missing (created) ./share/nls/lt_LT.ISO8859-4 missing (created) ./share/nls/nl_BE.ISO8859-1 missing (created) ./share/nls/nl_BE.ISO8859-15 missing (created) ./share/nls/nl_NL.ISO8859-1 missing (created) ./share/nls/nl_NL.ISO8859-15 missing (created) ./share/nls/no_NO.ISO8859-1 missing (created) ./share/nls/no_NO.ISO8859-15 missing (created) ./share/nls/pl_PL.ISO8859-2 missing (created) ./share/nls/pt_BR.ISO8859-1 missing (created) ./share/nls/pt_PT.ISO8859-1 missing (created) ./share/nls/pt_PT.ISO8859-15 missing (created) ./share/nls/ro_RO.ISO8859-2 missing (created) ./share/nls/ru_RU.CP866 missing (created) ./share/nls/ru_RU.ISO8859-5 missing (created) ./share/nls/ru_RU.KOI8-R missing (created) ./share/nls/sk_SK.ISO8859-2 missing (created) ./share/nls/sl_SI.ISO8859-2 missing (created) ./share/nls/sv_SE.ISO8859-1 missing (created) ./share/nls/sv_SE.ISO8859-15 missing (created) ./share/nls/tr_TR.ISO8859-9 missing (created) ./share/nls/uk_UA.ISO8859-5 missing (created) ./share/nls/uk_UA.KOI8-U missing (created) ./share/nls/zh_CN.eucCN missing (created) ./share/nls/zh_TW.Big5 missing (created) ./share/skel missing (created) ./var missing (created) ./var/db missing (created) ./var/db/dports missing (created) ./var/db/dports/distfiles missing (created) ./var/db/dports/receipts missing (created) DEBUG: Executing com.apple.destroot (zlib) DEBUG: Assembled command: 'cd "/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/zlib- 1.2.3" && make install prefix=/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local' cp zlib.h zconf.h/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/include chmod 644 /opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/include/zlib.h /opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/include/zconf.h cp libz.1.2.3.dylib/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/lib cd /opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/lib; chmod 755 libz.1.2.3.dylib cd /opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/lib; if test -f libz.1.2.3.dylib; then \ rm -f libz.dylib libz.1.dylib; \ ln -s libz.1.2.3.dylib libz.dylib; \ ln -s libz.1.2.3.dylib libz.1.dylib; \ (ldconfig || true) >/dev/null 2>&1; \ fi cp zlib.3/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/share/man/man3 chmod 644 /opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_archivers_zlib/work/destroot/opt/local/share/man/man3/zlib.3 DEBUG: Executing proc-post-com.apple.destroot-destroot-0 ---> Configuring libz.a Error: Target com.apple.destroot returned: invalid command name "command_exec" Warning: the following items did not execute (for zlib): com.apple.activate com.apple.destroot com.apple.install Error: Status 1 encountered during processing.