xfsprogs: disable install parallelism

Without the change install phase fails as:

    Installing libxfs-install
    ../../install-sh -o nixbld -g nixbld -m 644 ioctl_xfs_ag_geometry.2 /nix/store/chymzkiiv6c2rgl2gqrn4bqv5azhx9vf-xfsprogs-6.1.1-bin/share/man/man2/ioctl_xfs_ag_geometry.2
    make[1]: *** No rule to make target '\', needed by 'kmem.lo'.  Stop.
    make[1]: *** Waiting for unfinished jobs....
    make: *** [Makefile:148: libxfs-install] Error 2
    make: *** Waiting for unfinished jobs....

pkgs/tools/filesystems/xfsprogs/default.nix

@@ -23,6 +23,9 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ libuuid ]; # Dev headers include <uuid/uuid.h>
 
   enableParallelBuilding = true;
+  # Install fails as:
+  #   make[1]: *** No rule to make target '\', needed by 'kmem.lo'.  Stop.
+  enableParallelInstalling = false;
 
   # @sbindir@ is replaced with /run/current-system/sw/bin to fix dependency cycles
   preConfigure = ''