install nix using nix-installer

as per https://zero-to-nix.com/start/install/

- run nix-installer with --no-confirm

Author: capsulecorplab

playbook.yaml

@@ -155,9 +155,20 @@
     shell:
       cmd: mkdir -m 0755 /nix && chown root /nix
       executable: /bin/bash
-  - name: Install nix (as single-user) # as per https://nixos.org/download/#download-nix
+  - name: Download nix-installer # as https://zero-to-nix.com/start/install/
     shell:
-      cmd: set -x; sh <(curl -L https://nixos.org/nix/install) --no-daemon
+      cmd: curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix > nix-installer.sh
+      chdir: /home/kasm-default-profile/install_files
+      executable: /bin/bash
+  - name: Make nix-installer executable
+    shell:
+      cmd: chmod +x nix-installer.sh
+      chdir: /home/kasm-default-profile/install_files
+      executable: /bin/bash
+  - name: Install nix using nix-installer
+    shell:
+      cmd: ./nix-installer.sh install --no-confirm
+      chdir: /home/kasm-default-profile/install_files
       executable: /bin/bash
     register: output_of_nix_install
   - name: Display stdout of nix install