CI/Makefile: use the latest nightly

.github/actions/setup-wasm/action.yml

@@ -4,8 +4,7 @@ inputs:
   toolchain:
     description: 'Rust toolchain version'
     required: false
-    # FIXME: set to nightly when https://github.com/rust-lang/rust/issues/145652
-    default: 'nightly-2025-08-18'
+    default: 'nightly'
   wasm-bindgen-version:
     description: 'wasm-bindgen-cli version'
     required: false

.github/workflows/docs.yaml

@@ -49,7 +49,7 @@ jobs:
           # - ./github/workflows/docs.yaml
           # - ./github/workflows/fmt.yaml
           # - ./github/workflows/lint.yaml
-          toolchain: nightly-2025-08-18
+          toolchain: nightly
 
       - name: Build documentation
         run: make docs-build
@@ -108,7 +108,7 @@ jobs:
           # - ./github/workflows/docs.yaml
           # - ./github/workflows/fmt.yaml
           # - ./github/workflows/lint.yaml
-          toolchain: nightly-2025-08-18
+          toolchain: nightly
 
       - name: Build documentation
         run: make docs-build

.github/workflows/fmt.yaml

@@ -19,7 +19,7 @@ jobs:
           # - ./github/workflows/docs.yaml
           # - ./github/workflows/fmt.yaml
           # - ./github/workflows/lint.yaml
-          toolchain: nightly-2025-08-18
+          toolchain: nightly
           components: rustfmt
           cache-prefix: format-nightly-v0
       - uses: taiki-e/install-action@v2

.github/workflows/lint.yaml

@@ -55,7 +55,7 @@ jobs:
           # - ./github/workflows/docs.yaml
           # - ./github/workflows/fmt.yaml
           # - ./github/workflows/lint.yaml
-        toolchain: [nightly-2025-08-18]
+        toolchain: [nightly]
         ocaml_version: [4.14.2]
     steps:
       - uses: actions/checkout@v5

Makefile

@@ -6,7 +6,7 @@
 # - ./github/workflows/docs.yaml
 # - ./github/workflows/fmt.yaml
 # - ./github/workflows/lint.yaml
-NIGHTLY_RUST_VERSION = "nightly-2025-08-18"
+NIGHTLY_RUST_VERSION = "nightly"
 
 # Docker
 DOCKER_ORG ?= o1labs