diff --git a/devel/onetbb/Portfile b/devel/onetbb/Portfile
index ff3415d630a7..05ae92c6770a 100644
--- a/devel/onetbb/Portfile
+++ b/devel/onetbb/Portfile
@@ -27,9 +27,10 @@ checksums           rmd160  673fd51e1454dc783473ecf3a70824e263f104f5 \
 patchfiles          patch-onetbb-older-platforms.diff \
                     patch-onetbb-dispatch-fallback.diff
 
-compiler.blacklist-append   {clang < 700}
+# https://trac.macports.org/ticket/69657
+compiler.blacklist-append   {clang < 900}
 
-depends_build-append    port:pkgconfig
+depends_build-append    path:bin/pkg-config:pkgconfig
 
 depends_lib-append      port:hwloc