diff --git a/.cargo/config.toml b/.cargo/config.toml
index 00f716825e..a408305c4d 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,7 +1,3 @@
 [env]
 # Set the number of arenas to 16 when using jemalloc.
 JEMALLOC_SYS_WITH_MALLOC_CONF = "abort_conf:true,narenas:16"
-
-# FIXME: sccache temporarily disabled due to Windows issues
-[build]
-rustc-wrapper = ""
diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index e9db3b6ab1..2834d9f36a 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -13,7 +13,7 @@ jobs:
   build-and-upload-to-s3:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index e768208973..415f4db0e6 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -64,7 +64,7 @@ jobs:
             VERSION: ${{ needs.extract-version.outputs.VERSION }}
             VERSION_SUFFIX: ${{ needs.extract-version.outputs.VERSION_SUFFIX }}
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v5
             - name: Update Rust
               if: env.SELF_HOSTED_RUNNERS == 'false'
               run: rustup update stable
diff --git a/.github/workflows/linkcheck.yml b/.github/workflows/linkcheck.yml
index 7e8d9135dd..cc7775c083 100644
--- a/.github/workflows/linkcheck.yml
+++ b/.github/workflows/linkcheck.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Run mdbook server
         run: |
diff --git a/.github/workflows/local-testnet.yml b/.github/workflows/local-testnet.yml
index 5cffb4e2fd..283f60ed31 100644
--- a/.github/workflows/local-testnet.yml
+++ b/.github/workflows/local-testnet.yml
@@ -16,7 +16,7 @@ jobs:
   dockerfile-ubuntu:
     runs-on: ${{ github.repository == 'sigp/lighthouse' && fromJson('["self-hosted", "linux", "CI", "large"]') || 'ubuntu-latest'  }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Build Docker image
         run: |
@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-22.04
     needs: dockerfile-ubuntu
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install Kurtosis
         run: |
@@ -102,7 +102,7 @@ jobs:
     needs: dockerfile-ubuntu
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install Kurtosis
         run: |
@@ -138,7 +138,7 @@ jobs:
     needs: dockerfile-ubuntu
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install Kurtosis
         run: |
@@ -181,7 +181,7 @@ jobs:
       matrix:
         network: [sepolia, devnet]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install Kurtosis
         run: |
@@ -224,7 +224,7 @@ jobs:
         fork: [electra, fulu]
         offline_secs: [120, 300]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install Kurtosis
         run: |
@@ -268,7 +268,7 @@ jobs:
       'doppelganger-protection-failure-test',
     ]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Check that success job is dependent on all others
         run: |
           exclude_jobs='checkpoint-sync-test|genesis-sync-test'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d1d7db32ff..7c85cdd05c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -52,7 +52,7 @@ jobs:
         needs: extract-version
         steps:
             - name: Checkout sources
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
             - name: Get latest version of stable Rust
               if: env.SELF_HOSTED_RUNNERS == 'false'
               run: rustup update stable
@@ -160,7 +160,7 @@ jobs:
         steps:
             # This is necessary for generating the changelog. It has to come before "Download Artifacts" or else it deletes the artifacts.
             - name: Checkout sources
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
               with:
                   fetch-depth: 0
 
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index 617c5258bf..faa2745f55 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -28,9 +28,6 @@ env:
   CARGO_INCREMENTAL: 0
   # Enable portable to prevent issues with caching `blst` for the wrong CPU type
   TEST_FEATURES: portable
-  # FIXME: sccache disabled
-  RUSTC_WRAPPER: ""
-  SCCACHE_CACHE_SIZE: 0
 jobs:
   check-labels:
     runs-on: ubuntu-latest
@@ -84,7 +81,7 @@ jobs:
     # Use self-hosted runners only on the sigp repo.
     runs-on: ${{ github.repository == 'sigp/lighthouse' && fromJson('["self-hosted", "linux", "CI", "large"]') || 'ubuntu-latest'  }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     # Set Java version to 21. (required since Web3Signer 24.12.0).
     - uses: actions/setup-java@v4
       with:
@@ -107,7 +104,8 @@ jobs:
     - name: Run tests in release
       run: make nextest-release
     - name: Show cache stats
-      if: env.SELF_HOSTED_RUNNERS == 'true' && false
+      if: env.SELF_HOSTED_RUNNERS == 'true'
+      continue-on-error: true
       run: sccache --show-stats
   release-tests-windows:
     name: release-tests-windows
@@ -115,7 +113,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ${{ github.repository == 'sigp/lighthouse' && fromJson('["self-hosted", "windows", "CI"]') || 'windows-2019'  }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -138,7 +136,8 @@ jobs:
     - name: Run tests in release
       run: make nextest-release
     - name: Show cache stats
-      if: env.SELF_HOSTED_RUNNERS == 'true' && false
+      if: env.SELF_HOSTED_RUNNERS == 'true'
+      continue-on-error: true
       run: sccache --show-stats
   beacon-chain-tests:
     name: beacon-chain-tests
@@ -149,7 +148,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -160,7 +159,8 @@ jobs:
     - name: Run beacon_chain tests for all known forks
       run: make test-beacon-chain
     - name: Show cache stats
-      if: env.SELF_HOSTED_RUNNERS == 'true' && false
+      if: env.SELF_HOSTED_RUNNERS == 'true'
+      continue-on-error: true
       run: sccache --show-stats
   http-api-tests:
     name: http-api-tests
@@ -171,7 +171,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -182,7 +182,8 @@ jobs:
     - name: Run http_api tests for all recent forks
       run: make test-http-api
     - name: Show cache stats
-      if: env.SELF_HOSTED_RUNNERS == 'true' && false
+      if: env.SELF_HOSTED_RUNNERS == 'true'
+      continue-on-error: true
       run: sccache --show-stats
   op-pool-tests:
     name: op-pool-tests
@@ -192,7 +193,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -209,7 +210,7 @@ jobs:
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -237,7 +238,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -255,7 +256,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -270,7 +271,8 @@ jobs:
     - name: Run tests in debug
       run: make nextest-debug
     - name: Show cache stats
-      if: env.SELF_HOSTED_RUNNERS == 'true' && false
+      if: env.SELF_HOSTED_RUNNERS == 'true'
+      continue-on-error: true
       run: sccache --show-stats
   state-transition-vectors-ubuntu:
     name: state-transition-vectors-ubuntu
@@ -278,7 +280,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -295,7 +297,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -306,7 +308,8 @@ jobs:
     - name: Run consensus-spec-tests with blst and fake_crypto
       run: make nextest-ef
     - name: Show cache stats
-      if: env.SELF_HOSTED_RUNNERS == 'true' && false
+      if: env.SELF_HOSTED_RUNNERS == 'true'
+      continue-on-error: true
       run: sccache --show-stats
   basic-simulator-ubuntu:
     name: basic-simulator-ubuntu
@@ -314,7 +317,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -335,7 +338,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -356,7 +359,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ${{ github.repository == 'sigp/lighthouse' && fromJson('["self-hosted", "linux", "CI", "small"]') || 'ubuntu-latest'  }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -377,7 +380,7 @@ jobs:
     env:
       CARGO_INCREMENTAL: 1
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -407,7 +410,7 @@ jobs:
     name: check-msrv
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Install Rust at Minimum Supported Rust Version (MSRV)
       run: |
         metadata=$(cargo metadata --no-deps --format-version 1)
@@ -421,7 +424,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of nightly Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -449,7 +452,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Install dependencies
       run: sudo apt update && sudo apt install -y git gcc g++ make cmake pkg-config llvm-dev libclang-dev clang
     - name: Use Rust beta
@@ -462,7 +465,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -476,7 +479,7 @@ jobs:
     if: needs.check-labels.outputs.skip_ci != 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -516,6 +519,6 @@ jobs:
       'cargo-sort',
     ]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Check that success job is dependent on all others
         run: ./scripts/ci/check-success-job.sh ./.github/workflows/test-suite.yml test-suite-success