The TCL_PACKAGE_PATH variable is set to {/usr/lib} <em>with braces</em>.

<pre>
  $ sudo make install
  ...
  /usr/bin/install -c -d '{/usr/lib}/tcltls1.7.22'
  /usr/bin/install -c tcltls.so '{/usr/lib}/tcltls1.7.22'
  /usr/bin/install -c -m 644    pkgIndex.tcl '{/usr/lib}/tcltls1.7.22'
</pre>

As this is not valid brace expansion (comma is required), that results in creating a directory called <code>{</code> and installing the files under it, instead of /usr/lib.

This is actually a bug in the Tcl configure script. Starting in Tcl 8.6.11, the lines:

    if test "$prefix/lib" != "$libdir"; then
        TCL_PACKAGE_PATH="${libdir} ${prefix}/lib"
    else
        TCL_PACKAGE_PATH="${prefix}/lib"
    fi
 
were changed to:

    if test "$prefix/lib" != "$libdir"; then
        TCL_PACKAGE_PATH="{${libdir}} {${prefix}/lib}"
    else
        TCL_PACKAGE_PATH="{${prefix}/lib}"
    fi

The extra braces propagate into the tclConfig.sh file, which then breaks the makefile.

This issue is obsolete. TCL has been updated to correct the root cause and the make scripts have been changed to be TEA compliant with sane default options.