feat(nix): Replace standalone package.nix with flake.nix

.github/workflows/nix-build.yml

@@ -1,3 +1,4 @@
+---
 name: Nix Build Verification
 
 concurrency:
@@ -9,13 +10,15 @@ on:
     branches:
       - main
     paths:
-      - 'nix/**'
+      - 'flake.nix'
+      - 'flake.lock'
       - '.github/workflows/nix-build.yml'
   push:
     branches:
       - main
     paths:
-      - 'nix/**'
+      - 'flake.nix'
+      - 'flake.lock'
       - '.github/workflows/nix-build.yml'
   workflow_dispatch:
 
@@ -53,7 +56,7 @@ jobs:
 
       - name: Build with Nix
         run: |
-          nix-build nix/default.nix --show-trace
+          nix build .#infer --show-trace --print-build-logs
 
       - name: Verify binary
         run: |
@@ -93,15 +96,15 @@ jobs:
 
       - name: Check Nix formatting (nixfmt-rfc-style)
         run: |
-          nix-shell -p nixfmt-rfc-style --run "nixfmt --check nix/package.nix nix/default.nix"
+          nix-shell -p nixfmt-rfc-style --run "nixfmt --check flake.nix"
 
       - name: Lint with statix
         run: |
-          nix-shell -p statix --run "statix check nix/"
+          nix-shell -p statix --run "statix check flake.nix"
 
-      - name: Evaluate Nix expression
+      - name: Check flake evaluates on all systems
         run: |
-          nix-instantiate --eval --strict nix/default.nix --show-trace
+          nix flake check --all-systems --no-build --show-trace
 
   summary:
     name: Build Summary
@@ -124,4 +127,4 @@ jobs:
             exit 1
           fi
 
-          echo "✅ All Nix build checks passed!"
+          echo "All Nix build checks passed!"

.github/workflows/release.yml

@@ -65,11 +65,15 @@ jobs:
             @semantic-release/commit-analyzer@13.0.1 \
             @semantic-release/release-notes-generator@14.1.0 \
             @semantic-release/changelog@6.0.3 \
+            @semantic-release/exec@7.1.0 \
             @semantic-release/git@10.0.1 \
             @semantic-release/github@1.0.0 \
             conventional-changelog-conventionalcommits@9.1.0 \
             conventional-changelog-cli@5.0.0
 
+      - name: Install Determinate Nix
+        uses: DeterminateSystems/determinate-nix-action@v3
+
       - name: Check for existing releases
         id: check_releases
         env:

.releaserc.yaml

@@ -87,9 +87,15 @@ plugins:
         The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
         and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+  - - "@semantic-release/exec"
+    - prepareCmd: |
+        sed -i.bak 's|version = "[^"]*";|version = "${nextRelease.version}";|' flake.nix && rm flake.nix.bak
+        determinate-nixd fix hashes --auto-apply flake.nix
+
   - - "@semantic-release/git"
     - assets:
         - CHANGELOG.md
+        - flake.nix
       message: |
         chore(release): ${nextRelease.version} [skip ci]
 
@@ -124,6 +130,21 @@ plugins:
         curl -fsSL https://raw.githubusercontent.com/inference-gateway/cli/main/install.sh | bash -s -- --install-dir $HOME/.local/bin
         ```
 
+        ### Nix Flake
+
+        Run directly without installing:
+
+        ```bash
+        nix run github:inference-gateway/cli/<%= nextRelease.gitTag %>
+        ```
+
+        Or pin it in a [Flox](https://flox.dev) manifest (`.flox/env/manifest.toml`):
+
+        ```toml
+        [install]
+        infer.flake = "github:inference-gateway/cli/<%= nextRelease.gitTag %>"
+        ```
+
         ### Binary Download
 
         Download the appropriate binary for your platform from the assets below.