$ spack install tcl
...
==> tcl: Executing phase: 'install'
==> Error: FileNotFoundError: [Errno 2] No such file or directory: '/home/andrew/sta-toolchain/spack/opt/spack/linux-opensuse_leap15-haswell/gcc-8.4.0/tcl-8.6.8-dpeohvixrp4p4ktrfw66eow7nvrbcelq/lib/tclConfig.sh'

/home/andrew/sta-toolchain/spack/var/spack/repos/builtin/packages/tcl/package.py:58, in install:
         55            # Replace stage dir -> installed src dir in tclConfig
         56            filter_file(
         57                stage_src, installed_src,
  >>     58                join_path(self.spec.prefix, 'lib', 'tclConfig.sh'))
         59
         60        # Don't install binaries in src/ tree
         61        with working_dir(join_path(installed_src, self.configure_directory)):