diff --git a/.github/actions/build_conda/action.yml b/.github/actions/build_conda/action.yml
index 14c227035f..c27446d840 100644
--- a/.github/actions/build_conda/action.yml
+++ b/.github/actions/build_conda/action.yml
@@ -44,7 +44,7 @@ runs:
         # Ensure starting packages are from conda-forge.
         conda list --show-channel-urls
         conda install -y -q "conda!=24.11.0"
-        conda install -y -q "conda-build!=24.11.0" "liblief=0.14.1"
+        conda install -y -q "conda-build=25.3.1" "liblief=0.14.1"
         conda list --show-channel-urls
     - name: Enable anaconda uploads
       if: inputs.label != ''
diff --git a/.github/workflows/build-pull-request.yml b/.github/workflows/build-pull-request.yml
index bc0d2d625a..b1346f5ba5 100644
--- a/.github/workflows/build-pull-request.yml
+++ b/.github/workflows/build-pull-request.yml
@@ -30,134 +30,28 @@ jobs:
               git --no-pager diff --color
               exit 1
             fi
-  linux-x86_64-cmake:
-    name: Linux x86_64 (cmake)
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-  linux-x86_64-AVX2-cmake:
-    name: Linux x86_64 AVX2 (cmake)
-    needs: linux-x86_64-cmake
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-        with:
-          opt_level: avx2
-  linux-x86_64-AVX512-cmake:
-    name: Linux x86_64 AVX512 (cmake)
-    needs: linux-x86_64-cmake
-    runs-on: faiss-aws-m7i.large
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-        with:
-          opt_level: avx512
-  linux-x86_64-AVX512_SPR-cmake:
-    name: Linux x86_64 AVX512_SPR (cmake)
-    needs: linux-x86_64-cmake
-    runs-on: faiss-aws-m7i.large
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-        with:
-          opt_level: avx512_spr
-  linux-x86_64-GPU-cmake:
-    name: Linux x86_64 GPU (cmake)
-    needs: linux-x86_64-cmake
-    runs-on: 4-core-ubuntu-gpu-t4
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-        with:
-          gpu: ON
-  linux-x86_64-GPU-w-CUVS-cmake:
-    name: Linux x86_64 GPU w/ cuVS (cmake)
-    needs: linux-x86_64-cmake
-    runs-on: 4-core-ubuntu-gpu-t4
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-        with:
-          gpu: ON
-          cuvs: ON
-  linux-x86_64-GPU-w-ROCm-cmake:
-    name: Linux x86_64 GPU w/ ROCm (cmake)
-    needs: linux-x86_64-cmake
-    runs-on: faiss-amd-MI200
-    container:
-      image: ubuntu:22.04
-      options: --device=/dev/kfd --device=/dev/dri --ipc=host --shm-size 16G --group-add video --cap-add=SYS_PTRACE --cap-add=SYS_ADMIN
-    steps:
-      - name: Container setup
-        run: |
-            if [ -f /.dockerenv ]; then
-              apt-get update && apt-get install -y sudo && apt-get install -y git
-              git config --global --add safe.directory '*'
-            else
-              echo 'Skipping. Current job is not running inside a container.'
-            fi
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-        with:
-          gpu: ON
-          rocm: ON
-  linux-arm64-SVE-cmake:
-    name: Linux arm64 SVE (cmake)
-    needs: linux-x86_64-cmake
-    runs-on: faiss-aws-r8g.large
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build and Test (cmake)
-        uses: ./.github/actions/build_cmake
-        with:
-          opt_level: sve
-        env:
-          # Context: https://github.com/facebookresearch/faiss/wiki/Troubleshooting#surprising-faiss-openmp-and-openblas-interaction
-          OPENBLAS_NUM_THREADS: '1'
-  linux-x86_64-conda:
-    name: Linux x86_64 (conda)
-    needs: linux-x86_64-cmake
-    runs-on: ubuntu-latest
+  linux-x86_64-nightly:
+    name: Linux x86_64 nightlies
+    runs-on: 4-core-ubuntu
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
           fetch-tags: true
-      - name: Build and Package (conda)
-        uses: ./.github/actions/build_conda
-  windows-x86_64-conda:
-    name: Windows x86_64 (conda)
-    needs: linux-x86_64-cmake
-    runs-on: windows-2019
+      - uses: ./.github/actions/build_conda
+  osx-arm64-nightly:
+    name: OSX arm64 nightlies
+    runs-on: macos-14
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
           fetch-tags: true
-      - name: Build and Package (conda)
-        uses: ./.github/actions/build_conda
-  linux-arm64-conda:
-    name: Linux arm64 (conda)
-    needs: linux-x86_64-cmake
+      - uses: ./.github/actions/build_conda
+  linux-arm64-nightly:
+    name: Linux arm64 nightlies
     runs-on: 2-core-ubuntu-arm
     steps:
       - name: Checkout
@@ -165,5 +59,4 @@ jobs:
         with:
           fetch-depth: 0
           fetch-tags: true
-      - name: Build and Package (conda)
-        uses: ./.github/actions/build_conda
+      - uses: ./.github/actions/build_conda