Weird ::safe access path on NixOS

#!/bin/sh                   
# This line continues for Tcl, but is a single line for 'sh' \    
exec tclsh "$0" ${1+"$@"}

::safe::interpCreate untrusted
set accessPath [dict get [::safe::interpConfigure untrusted] -accessPath]    
puts [join $accessPath \n]

# Output:
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8.6
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8.6/encoding
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8.6/msgs
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8.6/opt0.4
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8.6/http1.0
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tdbcodbc1.1.5
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/thread2.8.8
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/sqlite3.40.0
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/pkgconfig
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/itcl4.2.3
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tdbcmysql1.1.5
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tdbcpostgres1.1.5
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tdbc1.1.5
# /run/current-system/sw/lib
# /run/current-system/sw/lib/gtk-4.0
# /run/current-system/sw/lib/xorg
# /run/current-system/sw/lib/girepository-1.0
# /run/current-system/sw/lib/kexec-tools
# /run/current-system/sw/lib/gvfs
# /run/current-system/sw/lib/thunarx-3
# /run/current-system/sw/lib/modprobe.d
# /run/current-system/sw/lib/wine  
# /run/current-system/sw/lib/alsa-topology
# /run/current-system/sw/lib/avahi  
# /run/current-system/sw/lib/perl5
# /run/current-system/sw/lib/pppd
# /run/current-system/sw/lib/credstore
# /run/current-system/sw/lib/gthumb 
# /run/current-system/sw/lib/bash    
# /run/current-system/sw/lib/tdbcodbc1.1.5
# /run/current-system/sw/lib/locale
# /run/current-system/sw/lib/tcl8   
# /run/current-system/sw/lib/retroarch
# /run/current-system/sw/lib/xfce4 
# /run/current-system/sw/lib/systemd
# /run/current-system/sw/lib/nvim
# /run/current-system/sw/lib/wireshark
# /run/current-system/sw/lib/parole-0
# /run/current-system/sw/lib/gtk-2.0
# /run/current-system/sw/lib/cups
# /run/current-system/sw/lib/iproute2  
# /run/current-system/sw/lib/thread2.8.8
# /run/current-system/sw/lib/node_modules
# /run/current-system/sw/lib/ntfs-3g
# /run/current-system/sw/lib/openjdk
# /run/current-system/sw/lib/sqlite3.40.0
# /run/current-system/sw/lib/polkit-1
# /run/current-system/sw/lib/security
# /run/current-system/sw/lib/rpm
# /run/current-system/sw/lib/gtk-3.0
# /run/current-system/sw/lib/tk8.6
# /run/current-system/sw/lib/libreoffice
# /run/current-system/sw/lib/pkgconfig
# /run/current-system/sw/lib/itcl4.2.3
# /run/current-system/sw/lib/gstreamer-1.0
# /run/current-system/sw/lib/xtables
# /run/current-system/sw/lib/tumbler-1
# /run/current-system/sw/lib/gio
# /run/current-system/sw/lib/ModemManager
# /run/current-system/sw/lib/tdbcmysql1.1.5
# /run/current-system/sw/lib/python3.11
# /run/current-system/sw/lib/cmake
# /run/current-system/sw/lib/vlc
# /run/current-system/sw/lib/Thunar
# /run/current-system/sw/lib/sane
# /run/current-system/sw/lib/pipewire-0.3
# /run/current-system/sw/lib/tdbcpostgres1.1.5
# /run/current-system/sw/lib/kvirc
# /run/current-system/sw/lib/rpm-plugins
# /run/current-system/sw/lib/udev
# /run/current-system/sw/lib/vscode
# /run/current-system/sw/lib/tcl8.6
# /run/current-system/sw/lib/spa-0.2
# /run/current-system/sw/lib/NetworkManager
# /run/current-system/sw/lib/tdbc1.1.5
# /run/current-system/sw/lib/terminfo
# /run/current-system/sw/lib/spotify
# /run/current-system/sw/lib/mousepad
# /run/current-system/sw/lib/alsa-lib
# /run/current-system/sw/lib/gawk
# /run/current-system/sw/lib/texinfo
# /run/current-system/sw/lib/kernel
# /run/current-system/sw/lib/man-db
# /run/current-system/sw/lib/wireplumber-0.4
# /run/current-system/sw/lib/sysusers.d
# /run/current-system/sw/lib/tc
# /run/current-system/sw/lib/X11
# /run/current-system/sw/lib/environment.d
# /run/current-system/sw/lib/tmpfiles.d
# /run/current-system/sw/lib/cryptsetup
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/site-tcl
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.0
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.1
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.2
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.3
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.4
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.5
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.6
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.4/platform
# /nix/store/csjbg60swfa7g5g948wfh7j2a9gfmzsk-tcl-8.6.13/lib/tcl8/8.6/tdbc