bump installed nix version to latest, and update test-nix-versions

Author: savil

.github/workflows/cli-tests.yaml

@@ -208,13 +208,13 @@ jobs:
         run: devbox rm go
 
   # Run a sanity test to make sure Devbox can install and remove packages with
-  # the last 3 Nix releases.
+  # the last few Nix releases.
   test-nix-versions:
     needs: build-devbox
     strategy:
       matrix:
         os: [ubuntu-latest, macos-13]
-        nix-version: [2.15.1, 2.16.1, 2.17.0, 2.18.0, 2.19.2]
+        nix-version: [2.15.1, 2.16.1, 2.17.0, 2.18.0, 2.19.2, 2.24.7]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4

internal/nix/install.go

@@ -38,7 +38,7 @@ func Install(writer io.Writer, daemon *bool) error {
 	}
 	defer r.Close()
 
-	installScript := "curl -L https://releases.nixos.org/nix/nix-2.18.1/install | sh -s"
+	installScript := "curl -L https://releases.nixos.org/nix/nix-2.24.7/install | sh -s"
 	if daemon != nil {
 		if *daemon {
 			installScript += " -- --daemon"