See https://trac.macports.org/ticket/42725.
--- MacPorts-2.3.4.orig/src/package1.0/portpkg.tcl	2014-01-27 09:23:40.000000000 -0600
+++ MacPorts-2.3.4/src/package1.0/portpkg.tcl	2016-06-16 11:54:11.000000000 -0500
@@ -148,73 +148,29 @@
         }
     }
 
-    if ([file exists "$packagemaker"]) {
-
-        ui_debug "Calling $packagemaker for $portname pkg"
-        if {${os.major} >= 9} {
-            if {${package.flat}} {
-                set pkgtarget "10.5"
-                set pkgresources " --scripts ${package.scripts}"
-                set infofile "${workpath}/PackageInfo"
-                write_package_info $infofile
-            } else {
-                set pkgtarget "10.3"
-                set pkgresources " --resources ${package.resources} --title \"$portname-$portversion\""
-                set infofile "${workpath}/Info.plist"
-                write_info_plist $infofile $portname $portversion $portrevision
-            }
-            set cmdline "PMResourceLocale=${language} $packagemaker --root ${destpath} --out ${pkgpath} ${pkgresources} --info $infofile --target $pkgtarget --domain system --id org.macports.$portname"
-            if {${os.major} >= 10} {
-                set v [mp_version_to_apple_version $portepoch $portversion $portrevision]
-                append cmdline " --version $v"
-                append cmdline " --no-relocate"
-            } else {
-                # 10.5 Leopard does not use current language, manually specify
-                append cmdline " -AppleLanguages \"(${language})\""
-            }
-            ui_debug "Running command line: $cmdline"
-            system $cmdline
-
-            if {${package.flat} && ${os.major} >= 10} {
-                # the package we just built is just a component
-                set componentpath "[file rootname ${pkgpath}]-component.pkg"
-                file rename -force ${pkgpath} ${componentpath}
-                # Generate a distribution
-                set productbuild [findBinary productbuild]
-                set cmdline "$productbuild --resources ${package.resources} --identifier org.macports.${portname} --distribution ${workpath}/Distribution --package-path ${package.destpath} ${pkgpath}"
-                ui_debug "Running command line: $cmdline"
-                system $cmdline
-            }
-        } else {
-            write_info_plist ${workpath}/Info.plist $portname $portversion $portrevision
-            write_description_plist ${workpath}/Description.plist $portname $portversion $description
-            system "$packagemaker -build -f ${destpath} -p ${pkgpath} -r ${package.resources} -i ${workpath}/Info.plist -d ${workpath}/Description.plist"
-        }
-
-        file delete ${workpath}/Info.plist \
-                    ${workpath}/PackageInfo \
-                    ${workpath}/Distribution \
-                    ${workpath}/Description.plist
-        file delete -force ${package.resources} \
-                           ${package.scripts}
-
-    } else {
-
-        file mkdir ${pkgpath}/Contents/Resources
-        foreach f [glob -directory ${package.resources} *] {
-            file copy -force -- $f ${pkgpath}/Contents/Resources
-        }
-
-        write_PkgInfo ${pkgpath}/Contents/PkgInfo
-        write_info_plist ${pkgpath}/Contents/Info.plist $portname $portversion $portrevision
-
-        system "[findBinary mkbom $portutil::autoconf::mkbom_path] ${destpath} ${pkgpath}/Contents/Archive.bom"
-        system "cd ${destpath} && [findBinary pax $portutil::autoconf::pax_path] -x cpio -w -z . > ${pkgpath}/Contents/Archive.pax.gz"
-
-        write_description_plist ${pkgpath}/Contents/Resources/Description.plist $portname $portversion $description
-        write_sizes_file ${pkgpath}/Contents/Resources/Archive.sizes ${pkgpath} ${destpath}
-
-    }
+    set pkgbuild [findBinary pkgbuild]
+    set v [mp_version_to_apple_version $portepoch $portversion $portrevision]
+    set cmdline "$pkgbuild --root ${destpath} --scripts ${package.scripts} --identifier org.macports.$portname --version $v ${pkgpath}"
+    set infofile "${workpath}/PackageInfo"
+    write_package_info $infofile
+    ui_debug "Running command line: $cmdline"
+    system $cmdline
+
+    # the package we just built is just a component
+    set componentpath "[file rootname ${pkgpath}]-component.pkg"
+    file rename -force ${pkgpath} ${componentpath}
+    # Generate a distribution
+    set productbuild [findBinary productbuild]
+    set cmdline "$productbuild --resources ${package.resources} --identifier org.macports.${portname} --distribution ${workpath}/Distribution --package-path ${package.destpath} ${pkgpath}"
+    ui_debug "Running command line: $cmdline"
+    system $cmdline
+
+    file delete ${workpath}/Info.plist \
+                ${workpath}/PackageInfo \
+                ${workpath}/Distribution \
+                ${workpath}/Description.plist
+    file delete -force ${package.resources} \
+                       ${package.scripts}
 
     foreach dir {etc var tmp} {
         if ([file exists "${destpath}/private/$dir"]) {