diff --git a/.github/workflows/gpu_test.yml b/.github/workflows/gpu_test.yml
index 333769cb9e..c03318d649 100644
--- a/.github/workflows/gpu_test.yml
+++ b/.github/workflows/gpu_test.yml
@@ -12,6 +12,8 @@ on:
 
 env:
   LD_LIBRARY_PATH: /usr/local/cuda/extras/CUPTI/lib64:/usr/local/cuda/lib64
+  # Use the uv from astral-sh/setup-uv instead of hatch's bundled (pyapp) uv.
+  HATCH_ENV_TYPE_VIRTUAL_UV_PATH: uv
 
 permissions:
   contents: read
@@ -59,6 +61,8 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         cache: 'pip'
+    - name: Install uv
+      uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
     - name: Install Hatch
       uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
       with:
diff --git a/.github/workflows/hypothesis.yaml b/.github/workflows/hypothesis.yaml
index a456b2aa0a..bc711c8490 100644
--- a/.github/workflows/hypothesis.yaml
+++ b/.github/workflows/hypothesis.yaml
@@ -18,6 +18,8 @@ concurrency:
 
 env:
   FORCE_COLOR: 3
+  # Use the uv from astral-sh/setup-uv instead of hatch's bundled (pyapp) uv.
+  HATCH_ENV_TYPE_VIRTUAL_UV_PATH: uv
 
 jobs:
 
@@ -54,6 +56,8 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         cache: 'pip'
+    - name: Install uv
+      uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
     - name: Install Hatch
       uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
       with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 62e571856b..142290d109 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,6 +13,11 @@ on:
 permissions:
   contents: read
 
+env:
+  # Use the uv from astral-sh/setup-uv; without an explicit path hatch
+  # bootstraps its own (pyapp) uv, which fails on non-3.12 runners.
+  HATCH_ENV_TYPE_VIRTUAL_UV_PATH: uv
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -60,10 +65,10 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         cache: 'pip'
+    - name: Install uv
+      uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
     - name: Install Hatch
-      uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
-      with:
-        version: '1.16.5'
+      run: python -m pip install hatch==1.16.5
     - name: Set Up Hatch Env
       env:
         HATCH_ENV: test.py${{ matrix.python-version }}-${{ matrix.dependency-set }}
@@ -109,10 +114,10 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         cache: 'pip'
+    - name: Install uv
+      uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
     - name: Install Hatch
-      uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
-      with:
-        version: '1.16.5'
+      run: python -m pip install hatch==1.16.5
     - name: Set Up Hatch Env
       env:
         HATCH_ENV: ${{ matrix.dependency-set }}
@@ -144,10 +149,10 @@ jobs:
       with:
         python-version: '3.13'
         cache: 'pip'
+    - name: Install uv
+      uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
     - name: Install Hatch
-      uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
-      with:
-        version: '1.16.5'
+      run: python -m pip install hatch==1.16.5
     - name: Set Up Hatch Env
       run: |
         hatch run doctest:pip list
@@ -168,10 +173,10 @@ jobs:
       with:
         python-version: '3.13'
         cache: 'pip'
+    - name: Install uv
+      uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
     - name: Install Hatch
-      uses: pypa/hatch@257e27e51a6a5616ed08a39a408a21c35c9931bc
-      with:
-        version: '1.16.5'
+      run: python -m pip install hatch==1.16.5
     - name: Run Benchmarks
       run: |
         hatch env run --env "test.py3.13-minimal" run-benchmark
diff --git a/pyproject.toml b/pyproject.toml
index e342e8305c..81a4461978 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -257,7 +257,7 @@ extra-dependencies = [
     'obstore==0.5.*',
 ]
 
-[tool.hatch.envs.defaults]
+[tool.hatch.envs.default]
 installer = "uv"
 
 [tool.hatch.envs.docs]