diff --git a/.github/actions/install-deps/action.yaml b/.github/actions/install-deps/action.yaml
index 35caf3c6f1..4bd35f4eff 100644
--- a/.github/actions/install-deps/action.yaml
+++ b/.github/actions/install-deps/action.yaml
@@ -14,7 +14,14 @@ name: "Install Dependencies"
 description: "Install and cache the project's myraid dependencies"
 
 inputs:
+    llvm:
+        default: "true"
+        description: "Insall LLVM 17?"
+    clean:
+        default: "false"
+        description: "Clean unused deps. This is helpful if we run out of HD but slow!"
     skip_cache:
+        default: "false"
         description: "Don't use cache from previous builds"
 
 outputs:
@@ -25,16 +32,14 @@ outputs:
 runs:
     using: "composite"
     steps:
-        # # This is helpful if we run out of HD but slow!
-        #
-        # - name: Clean System
-        #   uses: AdityaGarg8/remove-unwanted-software@v3
-        #   if: ${{ runner.os == 'Linux' }}
-        #   with:
-        #       remove-android: "true"
-        #       remove-dotnet: "true"
-        #       remove-haskell: "true"
-        #       remove-codeql: "true"
+        - name: Clean System
+          uses: AdityaGarg8/remove-unwanted-software@v3
+          if: ${{ inputs.clean == 'true' }}
+          with:
+              remove-android: "true"
+              remove-dotnet: "true"
+              remove-haskell: "true"
+              remove-codeql: "true"
 
         # https://github.com/open-telemetry/opentelemetry-cpp/issues/2998
         - name: Setup cmake
@@ -128,6 +133,7 @@ runs:
               components: rustfmt, clippy, rust-src
 
         - name: Install LLVM 17
+          if: ${{ inputs.llvm == 'true' }}
           uses: KyleMayes/install-llvm-action@v2
           with:
               version: "17"
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 34630c049f..672a3e0175 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -27,7 +27,7 @@ on:
             - binder/
             - docs/
             - examples/
-            - python/perspective/README.md
+            - rust/perspective-python/README.md
     pull_request:
         branches:
             - master
@@ -59,6 +59,12 @@ concurrency:
     cancel-in-progress: true
 
 jobs:
+    #  ,-,---.       .    .   ,-_/              .---.               .
+    #  '|___/ . . . |  ,-|   '  | ,-. .  , ,-. \___  ,-. ,-. . ,-. |-
+    #  ,|   \ | | | |  | |      | ,-| | /  ,-|     \ |   |   | | | |
+    # `-^---' `-^ ' `' `-^      | `-^ `'   `-^ `---' `-' '   ' |-' `'
+    #                        /` |                              |
+    #                        `--'                              '
     build_js:
         runs-on: ${{ matrix.os }}
         strategy:
@@ -100,54 +106,25 @@ jobs:
 
             - uses: actions/upload-artifact@v4
               with:
-                  name: perspective-dist
-                  path: rust/perspective-js/dist/
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-jupyterlab-dist
-                  path: packages/perspective-jupyterlab/dist/
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-viewer-d3fc-dist
-                  path: packages/perspective-viewer-d3fc/dist
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-viewer-datagrid-dist
-                  path: packages/perspective-viewer-datagrid/dist
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-viewer-openlayers-dist
-                  path: packages/perspective-viewer-openlayers/dist
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-esbuild-plugin-dist
-                  path: packages/perspective-esbuild-plugin/dist
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-webpack-plugin-dist
-                  path: packages/perspective-webpack-plugin/dist
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-cli-dist
-                  path: packages/perspective-cli/dist
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-workspace-dist
-                  path: packages/perspective-workspace/dist
-
-            - uses: actions/upload-artifact@v4
-              with:
-                  name: perspective-viewer-dist
-                  path: rust/perspective-viewer/dist
-
+                  name: perspective-js-dist
+                  path: |
+                      rust/perspective-js/dist/
+                      rust/perspective-viewer/dist
+                      packages/perspective-jupyterlab/dist/
+                      packages/perspective-viewer-d3fc/dist
+                      packages/perspective-viewer-datagrid/dist
+                      packages/perspective-viewer-openlayers/dist
+                      packages/perspective-esbuild-plugin/dist
+                      packages/perspective-webpack-plugin/dist
+                      packages/perspective-cli/dist
+                      packages/perspective-workspace/dist
+
+    #  ,-,---.       .    .  .-,--.     .  .
+    #  '|___/ . . . |  ,-|   '|__/ . . |- |-. ,-. ,-.
+    #  ,|   \ | | | |  | |   ,|    | | |  | | | | | |
+    # `-^---' `-^ ' `' `-^   `'    `-| `' ' ' `-' ' '
+    #                               /|
+    #                              `-'
     build_python:
         runs-on: ${{ matrix.os }}
         strategy:
@@ -174,11 +151,10 @@ jobs:
               with:
                   skip_cache: ${{ steps.config-step.outputs.SKIP_CACHE }}
 
+            # https://github.com/apache/arrow/issues/38391
             - if: runner.os == 'macOS'
               run: echo "MACOSX_DEPLOYMENT_TARGET=$(sw_vers -productVersion)" >> $GITHUB_ENV
 
-            - run: echo "VCPKG_INSTALLATION_ROOT=${{ steps.init-step.outputs.VCPKG_INSTALLATION_ROOT }}" >> $env:GITHUB_ENV
-
             - run: |
                   dir env:
               if: ${{ runner.os == 'Windows' }}
@@ -186,8 +162,8 @@ jobs:
             - name: Python Build
               run: pnpm run build
               env:
+                  VCPKG_ROOT: ${{ steps.init-step.outputs.VCPKG_INSTALLATION_ROOT }}
                   PACKAGE: "perspective-python"
-                  PSP_VCPKG_PATH: C:/vcpkg/scripts/buildsystems/vcpkg.cmake
                   PSP_USE_CCACHE: 1
                   CI: 1
 
@@ -209,6 +185,12 @@ jobs:
                   name: perspective-python-sdist
                   path: rust/target/wheels/*.tar.gz
 
+    #  ,-,---.       .    .   ,-_/             .          ,       .
+    #  '|___/ . . . |  ,-|   '  | . . ,-. . . |- ,-. ,-. )   ,-. |-.
+    #  ,|   \ | | | |  | |      | | | | | | | |  |-' |  /    ,-| | |
+    # `-^---' `-^ ' `' `-^      | `-^ |-' `-| `' `-' '  `--' `-^ ^-'
+    #                        /` |     |    /|
+    #                        `--'     '   `-'
     build_juptyerlab_extension:
         needs: [build_js, build_python]
         runs-on: ${{ matrix.os }}
@@ -239,14 +221,20 @@ jobs:
               with:
                   name: nbextension-dist
                   path: rust/perspective-python/perspective/nbextension
-                  if-no-files-found: error # TODO
+                  if-no-files-found: error
 
             - uses: actions/upload-artifact@v4
               with:
                   name: labextension-dist
                   path: rust/perspective-python/perspective/labextension
-                  if-no-files-found: error # TODO
-
+                  if-no-files-found: error
+
+    #  ,--,--'      .    ,-_/              .---.               .
+    #  `- | ,-. ,-. |-   '  | ,-. .  , ,-. \___  ,-. ,-. . ,-. |-
+    #   , | |-' `-. |       | ,-| | /  ,-|     \ |   |   | | | |
+    #   `-' `-' `-' `'      | `-^ `'   `-^ `---' `-' '   ' |-' `'
+    #                   /` |                              |
+    #                   `--'                              '
     test_js:
         needs: [build_js]
         runs-on: ${{ matrix.os }}
@@ -270,37 +258,13 @@ jobs:
             - name: Initialize Build
               uses: ./.github/actions/install-deps
               with:
+                  llvm: "false"
                   skip_cache: ${{ steps.config-step.outputs.SKIP_CACHE }}
 
             - uses: actions/download-artifact@v4
               with:
-                  name: perspective-dist
-                  path: rust/perspective-js/dist/
-
-            - uses: actions/download-artifact@v4
-              with:
-                  name: perspective-viewer-d3fc-dist
-                  path: packages/perspective-viewer-d3fc/dist
-
-            - uses: actions/download-artifact@v4
-              with:
-                  name: perspective-viewer-datagrid-dist
-                  path: packages/perspective-viewer-datagrid/dist
-
-            - uses: actions/download-artifact@v4
-              with:
-                  name: perspective-viewer-openlayers-dist
-                  path: packages/perspective-viewer-openlayers/dist
-
-            - uses: actions/download-artifact@v4
-              with:
-                  name: perspective-workspace-dist
-                  path: packages/perspective-workspace/dist
-
-            - uses: actions/download-artifact@v4
-              with:
-                  name: perspective-viewer-dist
-                  path: rust/perspective-viewer/dist
+                  name: perspective-js-dist
+                  path: .
 
             - name: Run Tests
               run: pnpm run test
@@ -308,6 +272,12 @@ jobs:
                   PACKAGE: "!perspective-python,!perspective-jupyterlab"
                   PSP_USE_CCACHE: 1
 
+    # ,--,--'      .   .-,--.     .  .
+    # `- | ,-. ,-. |-   '|__/ . . |- |-. ,-. ,-.
+    #  , | |-' `-. |    ,|    | | |  | | | | | |
+    #  `-' `-' `-' `'   `'    `-| `' ' ' `-' ' '
+    #                          /|
+    #                         `-'
     test_python:
         needs: [build_python]
         runs-on: ${{ matrix.os }}
@@ -334,6 +304,7 @@ jobs:
             - name: Initialize Build
               uses: ./.github/actions/install-deps
               with:
+                  llvm: "false"
                   skip_cache: ${{ steps.config-step.outputs.SKIP_CACHE }}
 
             - uses: actions/download-artifact@v4