diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 50e65a8..92784c6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,120 +1,120 @@
 name: build
 on: [push, pull_request]
 jobs:
-  ubuntu:
-    runs-on: ${{ matrix.os }}
-    if: ${{ !startsWith(github.ref_name, 'mac') && !startsWith(github.ref_name, 'windows') }}
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - postgres: 19
-            os: ubuntu-24.04
-          - postgres: 18
-            os: ubuntu-24.04
-          - postgres: 17
-            os: ubuntu-24.04
-          - postgres: 16
-            os: ubuntu-24.04-arm
-          - postgres: 15
-            os: ubuntu-22.04
-          - postgres: 14
-            os: ubuntu-22.04-arm
-          - postgres: 13
-            os: ubuntu-22.04
-    steps:
-      - uses: actions/checkout@v5
-      - uses: ankane/setup-postgres@v1
-        with:
-          postgres-version: ${{ matrix.postgres }}
-          dev-files: true
-      - run: make
-        env:
-          PG_CFLAGS: -DUSE_ASSERT_CHECKING -Wall -Wextra -Werror -Wno-unused-parameter -Wno-sign-compare ${{ matrix.postgres >= 18 && '-Wno-missing-field-initializers' || '' }}
-      - run: |
-          export PG_CONFIG=`which pg_config`
-          sudo --preserve-env=PG_CONFIG make install
-      - run: make installcheck
-      - if: ${{ failure() }}
-        run: cat regression.diffs
-      - run: |
-          sudo apt-get update
-          sudo apt-get install libipc-run-perl
-      - run: make prove_installcheck
-  mac:
-    runs-on: ${{ matrix.os }}
-    if: ${{ !startsWith(github.ref_name, 'windows') }}
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - postgres: 18
-            os: macos-26
-          - postgres: 14
-            os: macos-15-intel
-    steps:
-      - uses: actions/checkout@v5
-      - uses: ankane/setup-postgres@v1
-        with:
-          postgres-version: ${{ matrix.postgres }}
-      - run: make
-        env:
-          PG_CFLAGS: -DUSE_ASSERT_CHECKING -Wall -Wextra -Werror -Wno-unused-parameter -Wno-unknown-warning-option ${{ matrix.postgres >= 18 && '-Wno-missing-field-initializers' || '' }}
-      - run: make install
-      - run: make installcheck
-      - if: ${{ failure() }}
-        run: cat regression.diffs
-      # Homebrew Postgres does not enable TAP tests, so need to download
-      - run: |
-          brew install cpanm
-          cpanm --notest IPC::Run
-          wget -q https://github.com/postgres/postgres/archive/refs/tags/$TAG.tar.gz
-          tar xf $TAG.tar.gz
-          mv postgres-$TAG postgres
-        env:
-          TAG: ${{ matrix.postgres == 18 && 'REL_18_0' || 'REL_14_19' }}
-      - run: make prove_installcheck PROVE_FLAGS="-I ./postgres/src/test/perl -I ./test/perl"
-        env:
-          PERL5LIB: /Users/runner/perl5/lib/perl5
-      - run: make clean && $(brew --prefix llvm@$LLVM_VERSION)/bin/scan-build --status-bugs make
-        env:
-          LLVM_VERSION: ${{ matrix.os == 'macos-26' && 20 || 18 }}
-          PG_CFLAGS: -DUSE_ASSERT_CHECKING
-  windows:
-    runs-on: ${{ matrix.os }}
-    if: ${{ !startsWith(github.ref_name, 'mac') }}
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - postgres: 17
-            os: windows-2025
-          - postgres: 14
-            os: windows-2022
-    steps:
-      - uses: actions/checkout@v5
-      - uses: ankane/setup-postgres@v1
-        with:
-          postgres-version: ${{ matrix.postgres }}
-      - run: |
-          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat" && ^
-          nmake /NOLOGO /F Makefile.win && ^
-          nmake /NOLOGO /F Makefile.win install && ^
-          nmake /NOLOGO /F Makefile.win installcheck ${{ matrix.postgres != 17 && 'PG_REGRESS=$(PGROOT)\bin\pg_regress' || '' }} && ^
-          nmake /NOLOGO /F Makefile.win clean && ^
-          nmake /NOLOGO /F Makefile.win uninstall
-        shell: cmd
-      - if: ${{ failure() }}
-        run: cat regression.diffs
+  # ubuntu:
+  #   runs-on: ${{ matrix.os }}
+  #   if: ${{ !startsWith(github.ref_name, 'mac') && !startsWith(github.ref_name, 'windows') }}
+  #   strategy:
+  #     fail-fast: false
+  #     matrix:
+  #       include:
+  #         - postgres: 19
+  #           os: ubuntu-24.04
+  #         - postgres: 18
+  #           os: ubuntu-24.04
+  #         - postgres: 17
+  #           os: ubuntu-24.04
+  #         - postgres: 16
+  #           os: ubuntu-24.04-arm
+  #         - postgres: 15
+  #           os: ubuntu-22.04
+  #         - postgres: 14
+  #           os: ubuntu-22.04-arm
+  #         - postgres: 13
+  #           os: ubuntu-22.04
+  #   steps:
+  #     - uses: actions/checkout@v5
+  #     - uses: ankane/setup-postgres@v1
+  #       with:
+  #         postgres-version: ${{ matrix.postgres }}
+  #         dev-files: true
+  #     - run: make
+  #       env:
+  #         PG_CFLAGS: -DUSE_ASSERT_CHECKING -Wall -Wextra -Werror -Wno-unused-parameter -Wno-sign-compare ${{ matrix.postgres >= 18 && '-Wno-missing-field-initializers' || '' }}
+  #     - run: |
+  #         export PG_CONFIG=`which pg_config`
+  #         sudo --preserve-env=PG_CONFIG make install
+  #     - run: make installcheck
+  #     - if: ${{ failure() }}
+  #       run: cat regression.diffs
+  #     - run: |
+  #         sudo apt-get update
+  #         sudo apt-get install libipc-run-perl
+  #     - run: make prove_installcheck
+  # mac:
+  #   runs-on: ${{ matrix.os }}
+  #   if: ${{ !startsWith(github.ref_name, 'windows') }}
+  #   strategy:
+  #     fail-fast: false
+  #     matrix:
+  #       include:
+  #         - postgres: 18
+  #           os: macos-26
+  #         - postgres: 14
+  #           os: macos-15-intel
+  #   steps:
+  #     - uses: actions/checkout@v5
+  #     - uses: ankane/setup-postgres@v1
+  #       with:
+  #         postgres-version: ${{ matrix.postgres }}
+  #     - run: make
+  #       env:
+  #         PG_CFLAGS: -DUSE_ASSERT_CHECKING -Wall -Wextra -Werror -Wno-unused-parameter -Wno-unknown-warning-option ${{ matrix.postgres >= 18 && '-Wno-missing-field-initializers' || '' }}
+  #     - run: make install
+  #     - run: make installcheck
+  #     - if: ${{ failure() }}
+  #       run: cat regression.diffs
+  #     # Homebrew Postgres does not enable TAP tests, so need to download
+  #     - run: |
+  #         brew install cpanm
+  #         cpanm --notest IPC::Run
+  #         wget -q https://github.com/postgres/postgres/archive/refs/tags/$TAG.tar.gz
+  #         tar xf $TAG.tar.gz
+  #         mv postgres-$TAG postgres
+  #       env:
+  #         TAG: ${{ matrix.postgres == 18 && 'REL_18_0' || 'REL_14_19' }}
+  #     - run: make prove_installcheck PROVE_FLAGS="-I ./postgres/src/test/perl -I ./test/perl"
+  #       env:
+  #         PERL5LIB: /Users/runner/perl5/lib/perl5
+  #     - run: make clean && $(brew --prefix llvm@$LLVM_VERSION)/bin/scan-build --status-bugs make
+  #       env:
+  #         LLVM_VERSION: ${{ matrix.os == 'macos-26' && 20 || 18 }}
+  #         PG_CFLAGS: -DUSE_ASSERT_CHECKING
+  # windows:
+  #   runs-on: ${{ matrix.os }}
+  #   if: ${{ !startsWith(github.ref_name, 'mac') }}
+  #   strategy:
+  #     fail-fast: false
+  #     matrix:
+  #       include:
+  #         - postgres: 17
+  #           os: windows-2025
+  #         - postgres: 14
+  #           os: windows-2022
+  #   steps:
+  #     - uses: actions/checkout@v5
+  #     - uses: ankane/setup-postgres@v1
+  #       with:
+  #         postgres-version: ${{ matrix.postgres }}
+  #     - run: |
+  #         call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat" && ^
+  #         nmake /NOLOGO /F Makefile.win && ^
+  #         nmake /NOLOGO /F Makefile.win install && ^
+  #         nmake /NOLOGO /F Makefile.win installcheck ${{ matrix.postgres != 17 && 'PG_REGRESS=$(PGROOT)\bin\pg_regress' || '' }} && ^
+  #         nmake /NOLOGO /F Makefile.win clean && ^
+  #         nmake /NOLOGO /F Makefile.win uninstall
+  #       shell: cmd
+  #     - if: ${{ failure() }}
+  #       run: cat regression.diffs
   i386:
     if: ${{ !startsWith(github.ref_name, 'mac') && !startsWith(github.ref_name, 'windows') }}
     runs-on: ubuntu-latest
     container:
-      image: debian:12
+      image: alpine:3.23
       options: --platform linux/386
     steps:
-      - run: apt-get update && apt-get install -y build-essential git libipc-run-perl postgresql-15 postgresql-server-dev-15 sudo
-      - run: service postgresql start
+      - run: apk add --update build-base postgresql18
+      - run: rc-update add postgresql && rc-service postgresql start
       - run: |
           git clone https://github.com/${{ github.repository }}.git pgvector
           cd pgvector
@@ -129,15 +129,15 @@ jobs:
           PG_CFLAGS: -DUSE_ASSERT_CHECKING -Wall -Wextra -Werror -Wno-unused-parameter -Wno-sign-compare
       - if: ${{ failure() }}
         run: cat pgvector/regression.diffs
-  valgrind:
-    if: ${{ !startsWith(github.ref_name, 'mac') && !startsWith(github.ref_name, 'windows') }}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v5
-      - uses: ankane/setup-postgres-valgrind@v1
-        with:
-          postgres-version: 18
-          check-ub: yes
-      - run: make OPTFLAGS=""
-      - run: sudo --preserve-env=PG_CONFIG make install
-      - run: make installcheck
+  # valgrind:
+  #   if: ${{ !startsWith(github.ref_name, 'mac') && !startsWith(github.ref_name, 'windows') }}
+  #   runs-on: ubuntu-latest
+  #   steps:
+  #     - uses: actions/checkout@v5
+  #     - uses: ankane/setup-postgres-valgrind@v1
+  #       with:
+  #         postgres-version: 18
+  #         check-ub: yes
+  #     - run: make OPTFLAGS=""
+  #     - run: sudo --preserve-env=PG_CONFIG make install
+  #     - run: make installcheck