something went wrong with nix installation on mac os

[vanarasiantonyswamy]

repro steps:
On MAC OS- previously nix installed successful.
but it didnt detect nix when i typed on terminal(even new terminal)
nix --version or nix --help. says nix is not a command
so i tried to mv the files as provided in the clean up step and tried to install again using the below steps
back up /etc/bashrc to /etc/bashrc.backup-before-nix

• mv /etc/zshrc.backup-before-nix to /etc/zshrc
• mv /etc/bash.bashrc.backup-before-nix /etc/bash.bashrc
• mv bash.bashrc.backup-before-nix /etc/bash.bashrc

install nix using
sh <(curl -L https://nixos.org/nix/install) --daemon

terminal shows error
Oh no, something went wrong. If you can take all the output and open
an issue, we'd love to fix the problem so nobody else has this issue.

terminal shows execution as below
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 4052 100 4052 0 0 24295 0 --:--:-- --:--:-- --:--:-- 24295
downloading Nix 2.12.0 binary tarball for aarch64-darwin from 'https://releases.nixos.org/nix/nix-2.12.0/nix-2.12.0-aarch64-darwin.tar.xz' to '/var/folders/m8/t7xg8bk97cs3lx5y8rbq8bp40000gn/T/nix-binary-tarball-unpack.XXXXXXXXXX.e74iQxZW'...
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 10.1M 100 10.1M 0 0 16.5M 0 --:--:-- --:--:-- --:--:-- 16.6M
Switching to the Multi-user Installer
Welcome to the Multi-User Nix Installation

This installation tool will set up your computer with the Nix package
manager. This will happen in a few stages:

1. Make sure your computer doesn't already have Nix. If it does, I
   will show you instructions on how to clean up your old install.

2. Show you what I am going to install and where. Then I will ask
   if you are ready to continue.

3. Create the system users and groups that the Nix daemon uses to run
   builds.

4. Perform the basic installation of the Nix files daemon.

5. Configure your shell to import special Nix Profile files, so you
   can use Nix.

6. Start the Nix daemon.

Would you like to see a more detailed list of what I will do?
[y/n] y

I will:

• make sure your computer doesn't already have Nix files
  (if it does, I will tell you how to clean them up.)
• create local users (see the list above for the users I'll make)
• create a local group (nixbld)
• install Nix in to /nix
• create a configuration file in /etc/nix
• set up the "default profile" by creating some Nix-related files in
  /var/root
• back up /etc/bashrc to /etc/bashrc.backup-before-nix
• update /etc/bashrc to include some Nix configuration
• back up /etc/zshrc to /etc/zshrc.backup-before-nix
• update /etc/zshrc to include some Nix configuration
• back up /etc/bash.bashrc to /etc/bash.bashrc.backup-before-nix
• update /etc/bash.bashrc to include some Nix configuration
• create a Nix volume and a LaunchDaemon to mount it
• create a LaunchDaemon (at /Library/LaunchDaemons/org.nixos.nix-daemon.plist) for nix-daemon

Ready to continue?
[y/n] y

---- let's talk about sudo -----------------------------------------------------
This script is going to call sudo a lot. Every time I do, it'll
output exactly what it'll do, and why.

Just like this:

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo echo

to demonstrate how our sudo prompts look

This might look scary, but everything can be undone by running just a
few commands. I used to ask you to confirm each time sudo ran, but it
was too many times. Instead, I'll just ask you this one time:

Can I use sudo?
[y/n] y

Yay! Thanks! Let's get going!

~~> Fixing any leftover Nix volume state
Before I try to install, I'll check for any existing Nix volume config
and ask for your permission to remove it (so that the installer can
start fresh). I'll also ask for permission to fix any issues I spot.

---- Found existing Nix volume -------------------------------------------------
special: disk3s7
uuid: 98DA0C03-8374-4F20-B9DB-AE367EF51B4C
encrypted: no

During install, I add 'nix' to /etc/synthetic.conf, which instructs
macOS to create an empty root directory for mounting the Nix volume.
Can I remove /etc/synthetic.conf?
[y/n] y

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo rm /etc/synthetic.conf

to remove /etc/synthetic.conf

During install, I add '/nix' to /etc/fstab so that macOS knows what
mount options to use for the Nix volume.
Can I remove /etc/fstab?
[y/n] y

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo rm /etc/fstab

to remove /etc/fstab

The installer adds a LaunchDaemon to mount your Nix volume: org.nixos.darwin-store
Can I remove it?
[y/n] y

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo launchctl bootout system/org.nixos.darwin-store

to terminate the daemon

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo rm /Library/LaunchDaemons/org.nixos.darwin-store.plist

to remove the daemon definition

~~> Checking for artifacts of previous installs
Before I try to install, I'll check for signs Nix already is or has
been installed on this system.

---- Nix config report ---------------------------------------------------------
Temp Dir: /var/folders/m8/t7xg8bk97cs3lx5y8rbq8bp40000gn/T/tmp.bxx1Tn5R
Nix Root: /nix
Build Users: 32
Build Group ID: 30000
Build Group Name: nixbld

build users:
Username: UID
_nixbld1: 301
_nixbld2: 302
_nixbld3: 303
_nixbld4: 304
_nixbld5: 305
_nixbld6: 306
_nixbld7: 307
_nixbld8: 308
_nixbld9: 309
_nixbld10: 310
_nixbld11: 311
_nixbld12: 312
_nixbld13: 313
_nixbld14: 314
_nixbld15: 315
_nixbld16: 316
_nixbld17: 317
_nixbld18: 318
_nixbld19: 319
_nixbld20: 320
_nixbld21: 321
_nixbld22: 322
_nixbld23: 323
_nixbld24: 324
_nixbld25: 325
_nixbld26: 326
_nixbld27: 327
_nixbld28: 328
_nixbld29: 329
_nixbld30: 330
_nixbld31: 331
_nixbld32: 332

Ready to continue?
[y/n] y

---- Preparing a Nix volume ----------------------------------------------------
Nix traditionally stores its data in the root directory /nix, but
macOS now (starting in 10.15 Catalina) has a read-only root directory.
To support Nix, I will create a volume and configure macOS to mount it
at /nix.

~~> Configuring /etc/synthetic.conf to make a mount-point at /nix

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo /usr/bin/ex -u NONE -n /etc/synthetic.conf

to add Nix to /etc/synthetic.conf

~~> Creating a Nix volume

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo /usr/sbin/diskutil unmount force disk3s7

to ensure the Nix volume is not mounted

Volume Nix Store on disk3s7 force-unmounted

~~> Configuring /etc/fstab to specify volume mount options

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo /usr/sbin/vifs

to add nix to fstab

~~> Configuring LaunchDaemon to mount 'Nix Store'

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo /usr/bin/ex -u NONE -n /Library/LaunchDaemons/org.nixos.darwin-store.plist

to install the Nix volume mounter

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo launchctl bootstrap system /Library/LaunchDaemons/org.nixos.darwin-store.plist

to launch the Nix volume mounter

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo launchctl kickstart -k system/org.nixos.darwin-store

to launch the Nix volume mounter

~~> Setting up the build group nixbld
Exists: Yes

~~> Setting up the build user _nixbld1
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 1
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld2
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 2
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld3
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 3
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld4
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 4
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld5
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 5
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld6
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 6
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld7
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 7
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld8
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 8
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld9
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 9
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld10
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 10
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld11
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 11
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld12
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 12
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld13
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 13
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld14
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 14
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld15
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 15
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld16
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 16
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld17
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 17
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld18
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 18
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld19
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 19
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld20
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 20
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld21
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 21
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld22
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 22
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld23
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 23
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld24
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 24
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld25
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 25
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld26
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 26
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld27
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 27
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld28
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 28
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld29
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 29
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld30
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 30
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld31
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 31
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the build user _nixbld32
Exists: Yes
Hidden: Yes
Home Directory: /var/empty
Note: Nix build user 32
Logins Disabled: Yes
Member of nixbld: Yes
PrimaryGroupID: 30000

~~> Setting up the basic directory structure

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo /usr/sbin/chown -R root:nixbld /nix

to take root ownership of existing Nix store files

chown: /nix/.Spotlight-V100: Operation not permitted
chown: /nix/.Spotlight-V100: Operation not permitted
chown: /nix/.Trashes: Operation not permitted
chown: /nix/.Trashes: Operation not permitted

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo install -dv -m 0755 /nix /nix/var /nix/var/log /nix/var/log/nix /nix/var/log/nix/drvs /nix/var/nix /nix/var/nix/db /nix/var/nix/gcroots /nix/var/nix/profiles /nix/var/nix/temproots /nix/var/nix/userpool /nix/var/nix/daemon-socket /nix/var/nix/gcroots/per-user /nix/var/nix/profiles/per-user

to make the basic directory structure of Nix (part 1)

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo install -dv -g nixbld -m 1775 /nix/store

to make the basic directory structure of Nix (part 2)

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo install -dv -m 0555 /etc/nix

to place the default nix daemon configuration (part 1)

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo install -m 0664 /var/folders/m8/t7xg8bk97cs3lx5y8rbq8bp40000gn/T/tmp.bxx1Tn5R/.nix-channels /var/root/.nix-channels

to set up the default system channel (part 1)

~~> Installing Nix

---- sudo execution ------------------------------------------------------------
I am executing:

$ sudo cp -RPp ./store/0ky7rhm0ckf4vw7vg2v5cyarrbsblvmj-aws-crt-cpp-0.17.28 ./store/1dcbaii28xnv98zw2w5f0skn2mar1ck8-aws-c-auth-0.6.13 ./store/2033pdgsv4wgl0zx6nng9i8q5f4h18lk-libidn2-2.3.2 ./store/2im4pw4pl5zsr6mjhwrjfcinrl9qljhy-nss-cacert-3.80 ./store/3b8r3yspv7f7p92jfxg548cfxi7q19d7-bash-5.1-p16 ./store/3k2ygb7mk9ylm2r5g0iad7akg1qwas4g-libssh2-1.10.0 ./store/3qcn93slgnm0wz74fq3nsd2942k3vsfm-aws-c-cal-0.5.17 ./store/58ppyba9pbc8yxqiw11gv9aw2adh1lgg-libxml2-2.9.14 ./store/6d17z21w7h8vmpsnmr8dm73sb3mvkpp0-nlohmann_json-3.10.5 ./store/789cl5k5ca0m9sxkiqyl4ackv5f0cmfz-aws-sdk-cpp-1.9.238 ./store/79z2m5vwbqwzrmfsbbv6rvk04z2nzf0x-curl-7.83.1 ./store/7hn69mlypdg285ar3ia71prgcrsx521g-libiconv-50 ./store/7m37v9mnii266p2l21xl97s4666f7d2s-libarchive-3.6.1-lib ./store/7n5yamgzg5dpp5vb6ipdqgfh6cf30wmn-nix-2.12.0 ./store/7vfyla60szbi8h35q93mrsij6whb3q9q-aws-c-compression-0.2.14 ./store/8yr5vy7jasrizvnvm9d12iynbbvf8r3p-nghttp2-1.47.0-lib ./store/962rka435k9c9p5ng1z2y3gspi4gs7hr-libcxxabi-11.1.0 ./store/9h5pks3l96gkp7653x4jxsfz1ca41fdc-aws-c-io-0.11.0 ./store/9jzvhm113w1xndcc5p4lvbqpqvk01c17-aws-c-mqtt-0.7.10 ./store/9x2z66kf8g8p9y1bxkraspghsy8jb5nj-zstd-1.5.2 ./store/a08j7vsgfcvzx0ahl986v38mjrx3gkm0-brotli-1.0.9-lib ./store/blnw8pnh6srwwr31g23mh6b70g6viaam-libcxx-11.1.0 ./store/cfc8xcp3q1ccx9wrfkbagia95w6rsvsh-apple-framework-Security-11.0.0 ./store/cpl9nndqjgn238p3kdwws845gscavfh4-sqlite-3.38.5 ./store/czwp4nmcn5skjiylhbyhg5k21wv76w9j-libsodium-1.0.18 ./store/d1hxdg09lxql958cmnrjq68alnd73i39-aws-c-s3-0.1.39 ./store/dg4r67wwna6sb2drh7gj38byq91ix2z9-aws-c-common-0.7.0 ./store/gwxhwcf0m9yrhz5wql1181bjfp654m1b-zlib-1.2.12 ./store/h9z5lncphgm9if86wxrfqg7w7fv7khbh-libkrb5-1.19.3 ./store/jgwmpgiin89dp0jjpjlwily6fgj1xs1a-aws-c-sdkutils-0.1.2 ./store/kd48xgjihd6sz5gvf2bvj7kw7m7ybhmf-xz-5.2.5 ./store/n2bygl2nqg7r35mg4ny45cwkarxgx2xb-curl-7.83.1 ./store/nf20p297fz6sfs97m7rl7al9ywchi83n-openssl-1.1.1q ./store/p7755cvgiwvv6lvin1r25jy711p8fn2n-libunistring-1.0 ./store/pqdafiyw1aadb7898z9yq4sf5fyhc85g-boehm-gc-8.0.6 ./store/r6y0rvzx8z9z459ghmj1zrnpi4r7xa5v-aws-checksums-0.1.12 ./store/s5ikc3jlv67j9bm8463rjz3x09lcwm8v-aws-c-http-0.6.15 ./store/v2p3injpwnyf31vfllpz2k172mr58fn9-apple-lib-libDER ./store/vzbnm6afkdcbgb57npl06gk7rsap4sfy-apple-framework-CoreFoundation-11.0.0 ./store/w18g47jdi000hq064cb83j42kmbc4k3s-editline-1.17.1 ./store/w5n081lpdyhc5aa69cq59j9s1h626jgj-apple-framework-IOKit-11.0.0 ./store/xi7bwrkki4fwr6zam7gmcklnqq3f3d5h-aws-c-event-stream-0.2.7 ./store/y9j96x0zkxwwbqknr66r7bwczlxa4kk6-bzip2-1.0.6.0.2 ./store/y9rzzima6wdy0ph29ff09hr8vadfkx16-libobjc-11.0.0 /nix/store/

to copy the basic Nix files to the new store at /nix/store

cp: cannot overwrite directory /nix/store/cfc8xcp3q1ccx9wrfkbagia95w6rsvsh-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Versions/Current with non-directory ./store/cfc8xcp3q1ccx9wrfkbagia95w6rsvsh-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Versions/Current
cp: cannot overwrite directory /nix/store/cfc8xcp3q1ccx9wrfkbagia95w6rsvsh-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Headers with non-directory ./store/cfc8xcp3q1ccx9wrfkbagia95w6rsvsh-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Headers
cp: cannot overwrite directory /nix/store/cfc8xcp3q1ccx9wrfkbagia95w6rsvsh-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Modules with non-directory ./store/cfc8xcp3q1ccx9wrfkbagia95w6rsvsh-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Modules
cp: cannot overwrite directory /nix/store/h9z5lncphgm9if86wxrfqg7w7fv7khbh-libkrb5-1.19.3/sbin with non-directory ./store/h9z5lncphgm9if86wxrfqg7w7fv7khbh-libkrb5-1.19.3/sbin
cp: cannot overwrite directory /nix/store/vzbnm6afkdcbgb57npl06gk7rsap4sfy-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/CoreFoundation.framework/Versions/Current with non-directory ./store/vzbnm6afkdcbgb57npl06gk7rsap4sfy-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/CoreFoundation.framework/Versions/Current
cp: cannot overwrite directory /nix/store/vzbnm6afkdcbgb57npl06gk7rsap4sfy-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/CoreFoundation.framework/Headers with non-directory ./store/vzbnm6afkdcbgb57npl06gk7rsap4sfy-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/CoreFoundation.framework/Headers
cp: cannot overwrite directory /nix/store/vzbnm6afkdcbgb57npl06gk7rsap4sfy-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/CoreFoundation.framework/Modules with non-directory ./store/vzbnm6afkdcbgb57npl06gk7rsap4sfy-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/CoreFoundation.framework/Modules
cp: cannot overwrite directory /nix/store/w5n081lpdyhc5aa69cq59j9s1h626jgj-apple-framework-IOKit-11.0.0/Library/Frameworks/IOKit.framework/Versions/Current with non-directory ./store/w5n081lpdyhc5aa69cq59j9s1h626jgj-apple-framework-IOKit-11.0.0/Library/Frameworks/IOKit.framework/Versions/Current
cp: cannot overwrite directory /nix/store/w5n081lpdyhc5aa69cq59j9s1h626jgj-apple-framework-IOKit-11.0.0/Library/Frameworks/IOKit.framework/Headers with non-directory ./store/w5n081lpdyhc5aa69cq59j9s1h626jgj-apple-framework-IOKit-11.0.0/Library/Frameworks/IOKit.framework/Headers
cp: cannot overwrite directory /nix/store/w5n081lpdyhc5aa69cq59j9s1h626jgj-apple-framework-IOKit-11.0.0/Library/Frameworks/IOKit.framework/Modules with non-directory ./store/w5n081lpdyhc5aa69cq59j9s1h626jgj-apple-framework-IOKit-11.0.0/Library/Frameworks/IOKit.framework/Modules

---- oh no! --------------------------------------------------------------------
Oh no, something went wrong. If you can take all the output and open
an issue, we'd love to fix the problem so nobody else has this issue.

:(

We'd love to help if you need it.

You can open an issue at https://github.com/nixos/nix/issues

Or feel free to contact the team:

• Matrix: #nix:nixos.org
• IRC: in #nixos on irc.libera.chat
• twitter: @nixos_org
• forum: https://discourse.nixos.org
  see error

Expected behavior
to install nix successfully

A clear and concise description of what you expected to happen.

nix-env --version output
zsh: command not found: nix-env

Additional context

Add any other context about the problem here.

Priorities

Add 👍 to issues you find important.

[abathur]

You'll have to follow the uninstall instructions before reinstalling it: https://nixos.org/manual/nix/stable/installation/installing-binary.html#macos

For future reference: If you are reinstalling because Nix was missing from your PATH after a macOS update, you don't have to reinstall to fix this. The macOS update is overwriting the shell hook, but you can just replace it. See #3616 for more.