The build is indeed using https://ftp.gnu.org/gnu/guile/guile-2.2.3.tar.xz > I don't run into that in my build of 2.2.3 on macosx. You may have gnu-sed installed then. On Jan 07, 2018, at 11:41 AM, Dan Kegel wrote: Builds from release tarball might not run into this, as the tarball already includes the file that rule creates; at any rate, I don't run into that in my build of 2.2.3 on macosx.