diff --git a/.github/workflows/build_rocky.yml b/.github/workflows/build_rocky.yml
index 6bb1cdceb7..804a9c8053 100644
--- a/.github/workflows/build_rocky.yml
+++ b/.github/workflows/build_rocky.yml
@@ -9,6 +9,13 @@ jobs:
     container: rockylinux:9
 
     steps:
+      - name: Set up uv
+        uses: astral-sh/setup-uv@cec208311dfd045dd5311c1add060b2062131d57 # v8.0.0
+
+      - name: Install Python
+        # Installs latest Python version so it's preferred by uv over Rocky's system Python.
+        run: uv python install
+
       - name: Install Dependencies
         run: |
           dnf update -y
@@ -18,7 +25,6 @@ jobs:
                          sqlite-devel bzip2-devel zlib-devel openssl-devel xz-devel      \
                          readline-devel ncurses-devel libffi-devel libuuid-devel git-lfs \
                          findutils xz byacc patchelf libxkbcommon-devel
-          python3 -m pip install typing_extensions aqtinstall
           git config --global --add safe.directory '*'
 
       - name: Install aws cli
@@ -46,7 +52,7 @@ jobs:
       - name: Unpack Dependencies
         run: |
           cd build
-          python3 ../nix/cache_dependencies.py unpack
+          uv run ../nix/cache_dependencies.py unpack
 
       - name: ccache
         uses: hendrikmuhs/ccache-action@v1.2.22
@@ -57,7 +63,7 @@ jobs:
         shell: bash
         run: |
           set -o pipefail
-          CXXFLAGS="-O3" CFLAGS="-O3 ${DARWIN_C_SOURCE}" ADD_COMMIT_SHA=1 BUILD_CFG=Release BUILD_IFCVIEWER=ON python3 ./nix/build-all.py -v --diskcleanup 2>&1 | tee build.log
+          CXXFLAGS="-O3" CFLAGS="-O3 ${DARWIN_C_SOURCE}" ADD_COMMIT_SHA=1 BUILD_CFG=Release BUILD_IFCVIEWER=ON uv run ./nix/build-all.py -v --diskcleanup 2>&1 | tee build.log
 
       - name: Upload Build Logs
         if: always()
@@ -72,7 +78,7 @@ jobs:
       - name: Pack Dependencies
         run: |
           cd build
-          python3 ../nix/cache_dependencies.py pack
+          uv run ../nix/cache_dependencies.py pack
 
       - name: Commit and Push Changes to Build Repository
         run: |
diff --git a/.github/workflows/build_rocky_arm.yml b/.github/workflows/build_rocky_arm.yml
index e2e58766fb..0219660ba0 100644
--- a/.github/workflows/build_rocky_arm.yml
+++ b/.github/workflows/build_rocky_arm.yml
@@ -9,6 +9,13 @@ jobs:
     container: arm64v8/rockylinux:9
 
     steps:
+      - name: Set up uv
+        uses: astral-sh/setup-uv@cec208311dfd045dd5311c1add060b2062131d57 # v8.0.0
+
+      - name: Install Python
+        # Installs latest Python version so it's preferred by uv over Rocky's system Python.
+        run: uv python install
+
       - name: Install Dependencies
         run: |
           dnf update -y
@@ -18,7 +25,6 @@ jobs:
                          sqlite-devel bzip2-devel zlib-devel openssl-devel xz-devel      \
                          readline-devel ncurses-devel libffi-devel libuuid-devel git-lfs \
                          findutils xz byacc patchelf libxkbcommon-devel
-          python3 -m pip install typing_extensions aqtinstall
           git config --global --add safe.directory '*'
 
       - name: Install aws cli
@@ -46,7 +52,7 @@ jobs:
       - name: Unpack Dependencies
         run: |
           cd build
-          python3 ../nix/cache_dependencies.py unpack
+          uv run ../nix/cache_dependencies.py unpack
 
       - name: ccache
         uses: hendrikmuhs/ccache-action@v1.2.22
@@ -57,7 +63,7 @@ jobs:
         shell: bash
         run: |
           set -o pipefail
-          CXXFLAGS="-O3" CFLAGS="-O3 ${DARWIN_C_SOURCE}" ADD_COMMIT_SHA=1 BUILD_CFG=Release BUILD_IFCVIEWER=ON python3 ./nix/build-all.py -v --diskcleanup 2>&1 | tee build.log
+          CXXFLAGS="-O3" CFLAGS="-O3 ${DARWIN_C_SOURCE}" ADD_COMMIT_SHA=1 BUILD_CFG=Release BUILD_IFCVIEWER=ON uv run ./nix/build-all.py -v --diskcleanup 2>&1 | tee build.log
 
       - name: Upload Build Logs
         if: always()
@@ -72,7 +78,7 @@ jobs:
       - name: Pack Dependencies
         run: |
           cd build
-          python3 ../nix/cache_dependencies.py pack
+          uv run ../nix/cache_dependencies.py pack
 
       - name: Commit and Push Changes to Build Repository
         run: |
diff --git a/.github/workflows/ci-lint.yaml b/.github/workflows/ci-lint.yaml
index 6dc18453ad..4ef84f8cbb 100644
--- a/.github/workflows/ci-lint.yaml
+++ b/.github/workflows/ci-lint.yaml
@@ -95,8 +95,7 @@ jobs:
             echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
           }
 
-          run_check poe ruff-main
-          run_check poe ruff-old
+          run_check poe ruff
 
           exit $ERROR
         continue-on-error: true
diff --git a/nix/build-all.py b/nix/build-all.py
index 1b02d89a4e..cc7978d9b1 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -1,4 +1,6 @@
 #!/usr/bin/python
+# /// script
+# ///
 ###############################################################################
 #                                                                             #
 # This file is part of IfcOpenShell.                                          #
@@ -125,13 +127,7 @@ from collections.abc import Generator, Sequence
 from pathlib import Path
 from urllib.request import urlretrieve
 
-try:
-    from typing import Literal, Union
-except:
-    # python 3.6 compatibility for rocky 8
-    from typing import Union
-
-    from typing_extensions import Literal
+from typing import Literal, Union
 
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.INFO)
diff --git a/nix/cache_dependencies.py b/nix/cache_dependencies.py
index 3d115764b4..7d231779ee 100644
--- a/nix/cache_dependencies.py
+++ b/nix/cache_dependencies.py
@@ -1,3 +1,5 @@
+# /// script
+# ///
 """
 Cache built dependencies for builds.
 
diff --git a/pyproject.toml b/pyproject.toml
index 0a8d1ec80c..45c0b357a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -215,10 +215,7 @@ exclude = [
 
 [tool.poe.tasks]
 
-ruff-main = "ruff check --extend-exclude nix/build-all.py"
-# It's actually Python 3.6, but ruff only supports 3.7+, but it should do.
-ruff-old = "ruff check nix/build-all.py --target-version py37"
-ruff.sequence = ["ruff-main", "ruff-old"]
+ruff = "ruff check"
 
 black = "black ."
 
@@ -238,7 +235,7 @@ ty-venv-ios.sequence = [
     {cmd = "uv pip install -r src/ifcopenshell-python/type-check-requirements.txt --python=src/ifcopenshell-python/.venv"},
 ]
 
-format.sequence = ["black", "ruff-main", "ruff-old"]
+format.sequence = ["black", "ruff"]
 
 cmake-format = "gersemi . --in-place"