fixup! feat: simplify nix flake

Author: pranc1ngpegasus

.github/workflows/formal.yaml

@@ -26,6 +26,6 @@ jobs:
           cache-bin: "false"
           cache-workspace-crates: "true"
           cache-on-failure: "true"
-          cmd-format: nix develop .#ci --quiet -c {0}
+          cmd-format: nix develop .#default --quiet -c {0}
       - name: Explore lifecycle interleavings with Shuttle
-        run: nix develop .#ci --quiet --command cargo test -p wisp-lifecycle --test shuttle_lifecycle
+        run: nix develop .#default --quiet --command cargo test -p wisp-lifecycle --test shuttle_lifecycle

.github/workflows/nix.yaml

@@ -18,5 +18,5 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: ./.github/actions/setup-nix
       - uses: DeterminateSystems/flake-checker-action@de924abd783455e8429c858962b9e43062d19da1 # v13
-      - run: nix develop .#ci --quiet --command nixfmt --check flake.nix nix
+      - run: nix develop .#default --quiet --command nixfmt --check flake.nix nix
       - run: nix flake check --print-build-logs

.github/workflows/release.yaml

@@ -62,10 +62,10 @@ jobs:
           cache-bin: "false"
           cache-workspace-crates: "true"
           cache-on-failure: "true"
-          cmd-format: nix develop .#ci --quiet -c {0}
+          cmd-format: nix develop .#default --quiet -c {0}
 
       - name: Build Wisp binaries (release)
-        run: nix develop .#ci --quiet --command cargo build -p wisp-desktop -p wisp-mcp --release --locked
+        run: nix develop .#default --quiet --command cargo build -p wisp-desktop -p wisp-mcp --release --locked
 
       - name: Assemble Wisp.app bundle
         run: |

.github/workflows/rust-macos.yaml

@@ -37,11 +37,11 @@ jobs:
           cache-bin: "false"
           cache-workspace-crates: "true"
           cache-on-failure: "true"
-          cmd-format: nix develop .#ci --quiet -c {0}
+          cmd-format: nix develop .#default --quiet -c {0}
       - run: swift test --package-path native/WispAudioKit
       # Builds the WispAudioKit Swift static library through build.rs and
       # exercises the FFI round-trip via the smoke test in wisp-audiokit.
-      - run: nix develop .#ci --quiet --command cargo test -p wisp-audiokit
+      - run: nix develop .#default --quiet --command cargo test -p wisp-audiokit
       # Exercises AppModel/session reducer regressions where GPUI and the
       # WispAudioKit bridge can link against the Metal toolchain.
-      - run: nix develop .#ci --quiet --command cargo test -p wisp-desktop --all-targets
+      - run: nix develop .#default --quiet --command cargo test -p wisp-desktop --all-targets

.github/workflows/swift.yaml

@@ -20,4 +20,4 @@ jobs:
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: ./.github/actions/setup-nix
-      - run: nix develop .#ci --quiet --command swiftformat --lint native/WispAudioKit/Sources native/WispAudioKit/Tests
+      - run: nix develop .#default --quiet --command swiftformat --lint native/WispAudioKit/Sources native/WispAudioKit/Tests

.github/workflows/version-bump.yaml

@@ -123,7 +123,7 @@ jobs:
           # Sync the local crate versions in Cargo.lock without touching any
           # third-party pins. `--workspace` limits the update to the workspace
           # members, whose versions are inherited from the value we just set.
-          nix develop .#ci --quiet --command cargo update --workspace
+          nix develop .#default --quiet --command cargo update --workspace
 
           echo "--- Cargo.toml [workspace.package] ---"
           grep -n 'version' Cargo.toml | tail -1