diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ca630bc..5ff10e3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ permissions: {}
 
 env:
   JUMP_START: 1
-  ROC: ./roc_nightly/roc
+  ROC: roc
   EXAMPLES_DIR: ./examples/
 
 jobs:
@@ -24,28 +24,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Downloading latest roc nightly
-        run: |
-          if [[ "${{ runner.os }}-${{ runner.arch }}" == "Linux-ARM64" ]]; then
-            curl -fOL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-linux_arm64-latest.tar.gz
-          elif [[ "${{ runner.os }}" == "macOS" ]]; then
-            curl -fOL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-macos_apple_silicon-latest.tar.gz
-          else
-            curl -fOL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-linux_x86_64-latest.tar.gz
-          fi
-
-      - name: rename nightly tar
-        run: mv $(ls | grep "roc_nightly.*tar\.gz") roc_nightly.tar.gz
-
-      - name: decompress the tar
-        run: tar -xzf roc_nightly.tar.gz
-
-      - run: rm roc_nightly.tar.gz
-
-      - name: simplify nightly folder name
-        run: mv roc_nightly* roc_nightly
+      - uses: roc-lang/setup-roc@39c354a6a838a0089eea9068a0414f49b62c5c08
+        with:
+          # Note: nightly hashes are not verified because they are updated regularly.
+          version: nightly
 
-      - run: ./roc_nightly/roc version
+      - run: roc version
 
       - name: Install dependencies (Ubuntu)
         if: startsWith(matrix.os, 'ubuntu-')
@@ -78,10 +62,10 @@ jobs:
         if: startsWith(matrix.os, 'ubuntu-')
         run: |
           if [[ "${{ matrix.os }}" == *"-arm" ]]; then
-            # TODO debug this: CARGO_BUILD_TARGET=aarch64-unknown-linux-musl ./roc_nightly/roc build.roc -- --roc ./roc_nightly/roc
+            # TODO debug this: CARGO_BUILD_TARGET=aarch64-unknown-linux-musl roc build.roc -- --roc roc
             echo "no-op"
           else
-            CARGO_BUILD_TARGET=x86_64-unknown-linux-musl ./roc_nightly/roc build.roc -- --roc ./roc_nightly/roc
+            CARGO_BUILD_TARGET=x86_64-unknown-linux-musl roc build.roc -- --roc roc
           fi
           
 
diff --git a/.github/workflows/ci_nix.yml b/.github/workflows/ci_nix.yml
index 48b819a..043126c 100644
--- a/.github/workflows/ci_nix.yml
+++ b/.github/workflows/ci_nix.yml
@@ -15,8 +15,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # macos-13 uses x86-64 machine, macos-14 and macos-15 uses aarch64
-        os: [macos-13, macos-15, ubuntu-22.04, ubuntu-24.04-arm]
+        # macos-15-intel uses x86-64 machine, macos-14 and macos-15 uses aarch64
+        os: [macos-15-intel, macos-15, ubuntu-22.04, ubuntu-24.04-arm]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index fe7260b..496720f 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -37,18 +37,12 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v5
 
-      - name: Downloading latest roc nightly
-        run: |
-          curl -fOL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-linux_x86_64-latest.tar.gz
-
-      - name: prep nightly tar for use
-        run: |
-          mv $(ls | grep "roc_nightly.*tar\.gz") roc_nightly.tar.gz
-          tar -xzf roc_nightly.tar.gz
-          rm roc_nightly.tar.gz
-          mv roc_nightly* roc_nightly
+      - uses: roc-lang/setup-roc@39c354a6a838a0089eea9068a0414f49b62c5c08
+        with:
+          # Note: nightly hashes are not verified because they are updated regularly.
+          version: nightly
 
-      - run: ./roc_nightly/roc version
+      - run: roc version
         
       - name: Create temp directory for docs
         run: mkdir -p ./temp_docs
@@ -98,7 +92,7 @@ jobs:
         env:
           ROC_DOCS_URL_ROOT: /basic-webserver/main
         run: |
-          ./roc_nightly/roc docs ./platform/main.roc
+          roc docs ./platform/main.roc
 
           mkdir -p "./temp_docs/main"
 
diff --git a/.github/workflows/test_latest_release.yml b/.github/workflows/test_latest_release.yml
index a7a9e3b..ee7d7f8 100644
--- a/.github/workflows/test_latest_release.yml
+++ b/.github/workflows/test_latest_release.yml
@@ -14,8 +14,8 @@ jobs:
   test-latest-release:
     strategy:
       matrix:
-        # macos-13 uses x86_64, macos-14 uses apple silicon (arm64)
-        os: [ubuntu-22.04, macos-13, macos-14]
+        # macos-15-intel uses x86_64, macos-14 uses apple silicon (arm64)
+        os: [ubuntu-22.04, macos-15-intel, macos-14]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4