diff --git a/.github/workflows/getdeps_linux.yml b/.github/workflows/getdeps_linux.yml
index 0f08a07fc..8fcfe9a16 100644
--- a/.github/workflows/getdeps_linux.yml
+++ b/.github/workflows/getdeps_linux.yml
@@ -11,7 +11,7 @@ on:
     - main
 
 permissions:
-  contents: read
+  contents: read  #  to fetch code (actions/checkout)
 
 jobs:
   build:
@@ -19,9 +19,9 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Update system package info
-      run: sudo apt-get update
+      run: sudo --preserve-env=http_proxy apt-get update
     - name: Install system deps
-      run: sudo python3 build/fbcode_builder/getdeps.py --allow-system-packages install-system-deps --recursive cachelib && sudo python3 build/fbcode_builder/getdeps.py --allow-system-packages install-system-deps --recursive patchelf
+      run: sudo --preserve-env=http_proxy python3 build/fbcode_builder/getdeps.py --allow-system-packages install-system-deps --recursive cachelib && sudo --preserve-env=http_proxy python3 build/fbcode_builder/getdeps.py --allow-system-packages install-system-deps --recursive patchelf
     - id: paths
       name: Query paths
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages query-paths --recursive --src-dir=. cachelib  >> "$GITHUB_OUTPUT"
@@ -79,9 +79,6 @@ jobs:
     - name: Fetch sparsemap
       if: ${{ steps.paths.outputs.sparsemap_SOURCE }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests sparsemap
-    - name: Fetch bz2
-      if: ${{ steps.paths.outputs.bz2_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests bz2
     - name: Fetch openssl
       if: ${{ steps.paths.outputs.openssl_SOURCE }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests openssl
@@ -124,129 +121,537 @@ jobs:
     - name: Fetch mvfst
       if: ${{ steps.paths.outputs.mvfst_SOURCE }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests mvfst
-    - name: Fetch libffi
-      if: ${{ steps.paths.outputs.libffi_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests libffi
-    - name: Fetch ncurses
-      if: ${{ steps.paths.outputs.ncurses_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests ncurses
-    - name: Fetch python
-      if: ${{ steps.paths.outputs.python_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests python
     - name: Fetch fbthrift
       if: ${{ steps.paths.outputs.fbthrift_SOURCE }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages fetch --no-tests fbthrift
-    - name: Build libaio
+    - name: Restore libaio from cache
+      id: restore_libaio
       if: ${{ steps.paths.outputs.libaio_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.libaio_INSTALL }}
+       key: ${{ steps.paths.outputs.libaio_CACHE_KEY }}-install
+    - name: Build libaio
+      if: ${{ steps.paths.outputs.libaio_SOURCE && ! steps.restore_libaio.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libaio
-    - name: Build ninja
+    - name: Save libaio to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.libaio_SOURCE && ! steps.restore_libaio.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.libaio_INSTALL }}
+       key: ${{ steps.paths.outputs.libaio_CACHE_KEY }}-install
+    - name: Restore ninja from cache
+      id: restore_ninja
       if: ${{ steps.paths.outputs.ninja_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.ninja_INSTALL }}
+       key: ${{ steps.paths.outputs.ninja_CACHE_KEY }}-install
+    - name: Build ninja
+      if: ${{ steps.paths.outputs.ninja_SOURCE && ! steps.restore_ninja.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests ninja
-    - name: Build cmake
+    - name: Save ninja to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.ninja_SOURCE && ! steps.restore_ninja.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.ninja_INSTALL }}
+       key: ${{ steps.paths.outputs.ninja_CACHE_KEY }}-install
+    - name: Restore cmake from cache
+      id: restore_cmake
       if: ${{ steps.paths.outputs.cmake_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.cmake_INSTALL }}
+       key: ${{ steps.paths.outputs.cmake_CACHE_KEY }}-install
+    - name: Build cmake
+      if: ${{ steps.paths.outputs.cmake_SOURCE && ! steps.restore_cmake.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests cmake
-    - name: Build fmt
+    - name: Save cmake to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.cmake_SOURCE && ! steps.restore_cmake.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.cmake_INSTALL }}
+       key: ${{ steps.paths.outputs.cmake_CACHE_KEY }}-install
+    - name: Restore fmt from cache
+      id: restore_fmt
       if: ${{ steps.paths.outputs.fmt_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.fmt_INSTALL }}
+       key: ${{ steps.paths.outputs.fmt_CACHE_KEY }}-install
+    - name: Build fmt
+      if: ${{ steps.paths.outputs.fmt_SOURCE && ! steps.restore_fmt.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fmt
-    - name: Build googletest
+    - name: Save fmt to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.fmt_SOURCE && ! steps.restore_fmt.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.fmt_INSTALL }}
+       key: ${{ steps.paths.outputs.fmt_CACHE_KEY }}-install
+    - name: Restore googletest from cache
+      id: restore_googletest
       if: ${{ steps.paths.outputs.googletest_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.googletest_INSTALL }}
+       key: ${{ steps.paths.outputs.googletest_CACHE_KEY }}-install
+    - name: Build googletest
+      if: ${{ steps.paths.outputs.googletest_SOURCE && ! steps.restore_googletest.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests googletest
-    - name: Build xxhash
+    - name: Save googletest to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.googletest_SOURCE && ! steps.restore_googletest.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.googletest_INSTALL }}
+       key: ${{ steps.paths.outputs.googletest_CACHE_KEY }}-install
+    - name: Restore xxhash from cache
+      id: restore_xxhash
       if: ${{ steps.paths.outputs.xxhash_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.xxhash_INSTALL }}
+       key: ${{ steps.paths.outputs.xxhash_CACHE_KEY }}-install
+    - name: Build xxhash
+      if: ${{ steps.paths.outputs.xxhash_SOURCE && ! steps.restore_xxhash.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests xxhash
-    - name: Build zstd
+    - name: Save xxhash to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.xxhash_SOURCE && ! steps.restore_xxhash.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.xxhash_INSTALL }}
+       key: ${{ steps.paths.outputs.xxhash_CACHE_KEY }}-install
+    - name: Restore zstd from cache
+      id: restore_zstd
       if: ${{ steps.paths.outputs.zstd_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.zstd_INSTALL }}
+       key: ${{ steps.paths.outputs.zstd_CACHE_KEY }}-install
+    - name: Build zstd
+      if: ${{ steps.paths.outputs.zstd_SOURCE && ! steps.restore_zstd.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests zstd
-    - name: Build zlib
+    - name: Save zstd to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.zstd_SOURCE && ! steps.restore_zstd.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.zstd_INSTALL }}
+       key: ${{ steps.paths.outputs.zstd_CACHE_KEY }}-install
+    - name: Restore zlib from cache
+      id: restore_zlib
       if: ${{ steps.paths.outputs.zlib_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.zlib_INSTALL }}
+       key: ${{ steps.paths.outputs.zlib_CACHE_KEY }}-install
+    - name: Build zlib
+      if: ${{ steps.paths.outputs.zlib_SOURCE && ! steps.restore_zlib.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests zlib
-    - name: Build boost
+    - name: Save zlib to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.zlib_SOURCE && ! steps.restore_zlib.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.zlib_INSTALL }}
+       key: ${{ steps.paths.outputs.zlib_CACHE_KEY }}-install
+    - name: Restore boost from cache
+      id: restore_boost
       if: ${{ steps.paths.outputs.boost_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.boost_INSTALL }}
+       key: ${{ steps.paths.outputs.boost_CACHE_KEY }}-install
+    - name: Build boost
+      if: ${{ steps.paths.outputs.boost_SOURCE && ! steps.restore_boost.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests boost
-    - name: Build double-conversion
+    - name: Save boost to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.boost_SOURCE && ! steps.restore_boost.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.boost_INSTALL }}
+       key: ${{ steps.paths.outputs.boost_CACHE_KEY }}-install
+    - name: Restore double-conversion from cache
+      id: restore_double-conversion
       if: ${{ steps.paths.outputs.double-conversion_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.double-conversion_INSTALL }}
+       key: ${{ steps.paths.outputs.double-conversion_CACHE_KEY }}-install
+    - name: Build double-conversion
+      if: ${{ steps.paths.outputs.double-conversion_SOURCE && ! steps.restore_double-conversion.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests double-conversion
-    - name: Build fast_float
+    - name: Save double-conversion to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.double-conversion_SOURCE && ! steps.restore_double-conversion.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.double-conversion_INSTALL }}
+       key: ${{ steps.paths.outputs.double-conversion_CACHE_KEY }}-install
+    - name: Restore fast_float from cache
+      id: restore_fast_float
       if: ${{ steps.paths.outputs.fast_float_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.fast_float_INSTALL }}
+       key: ${{ steps.paths.outputs.fast_float_CACHE_KEY }}-install
+    - name: Build fast_float
+      if: ${{ steps.paths.outputs.fast_float_SOURCE && ! steps.restore_fast_float.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fast_float
-    - name: Build gflags
+    - name: Save fast_float to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.fast_float_SOURCE && ! steps.restore_fast_float.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.fast_float_INSTALL }}
+       key: ${{ steps.paths.outputs.fast_float_CACHE_KEY }}-install
+    - name: Restore gflags from cache
+      id: restore_gflags
       if: ${{ steps.paths.outputs.gflags_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.gflags_INSTALL }}
+       key: ${{ steps.paths.outputs.gflags_CACHE_KEY }}-install
+    - name: Build gflags
+      if: ${{ steps.paths.outputs.gflags_SOURCE && ! steps.restore_gflags.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests gflags
-    - name: Build glog
+    - name: Save gflags to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.gflags_SOURCE && ! steps.restore_gflags.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.gflags_INSTALL }}
+       key: ${{ steps.paths.outputs.gflags_CACHE_KEY }}-install
+    - name: Restore glog from cache
+      id: restore_glog
       if: ${{ steps.paths.outputs.glog_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.glog_INSTALL }}
+       key: ${{ steps.paths.outputs.glog_CACHE_KEY }}-install
+    - name: Build glog
+      if: ${{ steps.paths.outputs.glog_SOURCE && ! steps.restore_glog.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests glog
-    - name: Build libdwarf
+    - name: Save glog to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.glog_SOURCE && ! steps.restore_glog.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.glog_INSTALL }}
+       key: ${{ steps.paths.outputs.glog_CACHE_KEY }}-install
+    - name: Restore libdwarf from cache
+      id: restore_libdwarf
       if: ${{ steps.paths.outputs.libdwarf_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.libdwarf_INSTALL }}
+       key: ${{ steps.paths.outputs.libdwarf_CACHE_KEY }}-install
+    - name: Build libdwarf
+      if: ${{ steps.paths.outputs.libdwarf_SOURCE && ! steps.restore_libdwarf.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libdwarf
-    - name: Build libevent
+    - name: Save libdwarf to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.libdwarf_SOURCE && ! steps.restore_libdwarf.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.libdwarf_INSTALL }}
+       key: ${{ steps.paths.outputs.libdwarf_CACHE_KEY }}-install
+    - name: Restore libevent from cache
+      id: restore_libevent
       if: ${{ steps.paths.outputs.libevent_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.libevent_INSTALL }}
+       key: ${{ steps.paths.outputs.libevent_CACHE_KEY }}-install
+    - name: Build libevent
+      if: ${{ steps.paths.outputs.libevent_SOURCE && ! steps.restore_libevent.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libevent
-    - name: Build lz4
+    - name: Save libevent to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.libevent_SOURCE && ! steps.restore_libevent.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.libevent_INSTALL }}
+       key: ${{ steps.paths.outputs.libevent_CACHE_KEY }}-install
+    - name: Restore lz4 from cache
+      id: restore_lz4
       if: ${{ steps.paths.outputs.lz4_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.lz4_INSTALL }}
+       key: ${{ steps.paths.outputs.lz4_CACHE_KEY }}-install
+    - name: Build lz4
+      if: ${{ steps.paths.outputs.lz4_SOURCE && ! steps.restore_lz4.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests lz4
-    - name: Build snappy
+    - name: Save lz4 to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.lz4_SOURCE && ! steps.restore_lz4.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.lz4_INSTALL }}
+       key: ${{ steps.paths.outputs.lz4_CACHE_KEY }}-install
+    - name: Restore snappy from cache
+      id: restore_snappy
       if: ${{ steps.paths.outputs.snappy_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.snappy_INSTALL }}
+       key: ${{ steps.paths.outputs.snappy_CACHE_KEY }}-install
+    - name: Build snappy
+      if: ${{ steps.paths.outputs.snappy_SOURCE && ! steps.restore_snappy.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests snappy
-    - name: Build sparsemap
+    - name: Save snappy to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.snappy_SOURCE && ! steps.restore_snappy.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.snappy_INSTALL }}
+       key: ${{ steps.paths.outputs.snappy_CACHE_KEY }}-install
+    - name: Restore sparsemap from cache
+      id: restore_sparsemap
       if: ${{ steps.paths.outputs.sparsemap_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.sparsemap_INSTALL }}
+       key: ${{ steps.paths.outputs.sparsemap_CACHE_KEY }}-install
+    - name: Build sparsemap
+      if: ${{ steps.paths.outputs.sparsemap_SOURCE && ! steps.restore_sparsemap.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests sparsemap
-    - name: Build bz2
-      if: ${{ steps.paths.outputs.bz2_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests bz2
-    - name: Build openssl
+    - name: Save sparsemap to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.sparsemap_SOURCE && ! steps.restore_sparsemap.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.sparsemap_INSTALL }}
+       key: ${{ steps.paths.outputs.sparsemap_CACHE_KEY }}-install
+    - name: Restore openssl from cache
+      id: restore_openssl
       if: ${{ steps.paths.outputs.openssl_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.openssl_INSTALL }}
+       key: ${{ steps.paths.outputs.openssl_CACHE_KEY }}-install
+    - name: Build openssl
+      if: ${{ steps.paths.outputs.openssl_SOURCE && ! steps.restore_openssl.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests openssl
-    - name: Build liboqs
+    - name: Save openssl to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.openssl_SOURCE && ! steps.restore_openssl.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.openssl_INSTALL }}
+       key: ${{ steps.paths.outputs.openssl_CACHE_KEY }}-install
+    - name: Restore liboqs from cache
+      id: restore_liboqs
       if: ${{ steps.paths.outputs.liboqs_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.liboqs_INSTALL }}
+       key: ${{ steps.paths.outputs.liboqs_CACHE_KEY }}-install
+    - name: Build liboqs
+      if: ${{ steps.paths.outputs.liboqs_SOURCE && ! steps.restore_liboqs.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests liboqs
-    - name: Build autoconf
+    - name: Save liboqs to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.liboqs_SOURCE && ! steps.restore_liboqs.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.liboqs_INSTALL }}
+       key: ${{ steps.paths.outputs.liboqs_CACHE_KEY }}-install
+    - name: Restore autoconf from cache
+      id: restore_autoconf
       if: ${{ steps.paths.outputs.autoconf_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.autoconf_INSTALL }}
+       key: ${{ steps.paths.outputs.autoconf_CACHE_KEY }}-install
+    - name: Build autoconf
+      if: ${{ steps.paths.outputs.autoconf_SOURCE && ! steps.restore_autoconf.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests autoconf
-    - name: Build automake
+    - name: Save autoconf to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.autoconf_SOURCE && ! steps.restore_autoconf.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.autoconf_INSTALL }}
+       key: ${{ steps.paths.outputs.autoconf_CACHE_KEY }}-install
+    - name: Restore automake from cache
+      id: restore_automake
       if: ${{ steps.paths.outputs.automake_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.automake_INSTALL }}
+       key: ${{ steps.paths.outputs.automake_CACHE_KEY }}-install
+    - name: Build automake
+      if: ${{ steps.paths.outputs.automake_SOURCE && ! steps.restore_automake.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests automake
-    - name: Build libtool
+    - name: Save automake to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.automake_SOURCE && ! steps.restore_automake.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.automake_INSTALL }}
+       key: ${{ steps.paths.outputs.automake_CACHE_KEY }}-install
+    - name: Restore libtool from cache
+      id: restore_libtool
       if: ${{ steps.paths.outputs.libtool_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.libtool_INSTALL }}
+       key: ${{ steps.paths.outputs.libtool_CACHE_KEY }}-install
+    - name: Build libtool
+      if: ${{ steps.paths.outputs.libtool_SOURCE && ! steps.restore_libtool.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libtool
-    - name: Build numa
+    - name: Save libtool to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.libtool_SOURCE && ! steps.restore_libtool.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.libtool_INSTALL }}
+       key: ${{ steps.paths.outputs.libtool_CACHE_KEY }}-install
+    - name: Restore numa from cache
+      id: restore_numa
       if: ${{ steps.paths.outputs.numa_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.numa_INSTALL }}
+       key: ${{ steps.paths.outputs.numa_CACHE_KEY }}-install
+    - name: Build numa
+      if: ${{ steps.paths.outputs.numa_SOURCE && ! steps.restore_numa.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests numa
-    - name: Build libiberty
+    - name: Save numa to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.numa_SOURCE && ! steps.restore_numa.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.numa_INSTALL }}
+       key: ${{ steps.paths.outputs.numa_CACHE_KEY }}-install
+    - name: Restore libiberty from cache
+      id: restore_libiberty
       if: ${{ steps.paths.outputs.libiberty_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.libiberty_INSTALL }}
+       key: ${{ steps.paths.outputs.libiberty_CACHE_KEY }}-install
+    - name: Build libiberty
+      if: ${{ steps.paths.outputs.libiberty_SOURCE && ! steps.restore_libiberty.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libiberty
-    - name: Build libsodium
+    - name: Save libiberty to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.libiberty_SOURCE && ! steps.restore_libiberty.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.libiberty_INSTALL }}
+       key: ${{ steps.paths.outputs.libiberty_CACHE_KEY }}-install
+    - name: Restore libsodium from cache
+      id: restore_libsodium
       if: ${{ steps.paths.outputs.libsodium_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.libsodium_INSTALL }}
+       key: ${{ steps.paths.outputs.libsodium_CACHE_KEY }}-install
+    - name: Build libsodium
+      if: ${{ steps.paths.outputs.libsodium_SOURCE && ! steps.restore_libsodium.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libsodium
-    - name: Build libunwind
+    - name: Save libsodium to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.libsodium_SOURCE && ! steps.restore_libsodium.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.libsodium_INSTALL }}
+       key: ${{ steps.paths.outputs.libsodium_CACHE_KEY }}-install
+    - name: Restore libunwind from cache
+      id: restore_libunwind
       if: ${{ steps.paths.outputs.libunwind_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.libunwind_INSTALL }}
+       key: ${{ steps.paths.outputs.libunwind_CACHE_KEY }}-install
+    - name: Build libunwind
+      if: ${{ steps.paths.outputs.libunwind_SOURCE && ! steps.restore_libunwind.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libunwind
-    - name: Build xz
+    - name: Save libunwind to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.libunwind_SOURCE && ! steps.restore_libunwind.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.libunwind_INSTALL }}
+       key: ${{ steps.paths.outputs.libunwind_CACHE_KEY }}-install
+    - name: Restore xz from cache
+      id: restore_xz
       if: ${{ steps.paths.outputs.xz_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.xz_INSTALL }}
+       key: ${{ steps.paths.outputs.xz_CACHE_KEY }}-install
+    - name: Build xz
+      if: ${{ steps.paths.outputs.xz_SOURCE && ! steps.restore_xz.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests xz
-    - name: Build folly
+    - name: Save xz to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.xz_SOURCE && ! steps.restore_xz.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.xz_INSTALL }}
+       key: ${{ steps.paths.outputs.xz_CACHE_KEY }}-install
+    - name: Restore folly from cache
+      id: restore_folly
       if: ${{ steps.paths.outputs.folly_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.folly_INSTALL }}
+       key: ${{ steps.paths.outputs.folly_CACHE_KEY }}-install
+    - name: Build folly
+      if: ${{ steps.paths.outputs.folly_SOURCE && ! steps.restore_folly.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests folly
-    - name: Build fizz
+    - name: Save folly to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.folly_SOURCE && ! steps.restore_folly.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.folly_INSTALL }}
+       key: ${{ steps.paths.outputs.folly_CACHE_KEY }}-install
+    - name: Restore fizz from cache
+      id: restore_fizz
       if: ${{ steps.paths.outputs.fizz_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.fizz_INSTALL }}
+       key: ${{ steps.paths.outputs.fizz_CACHE_KEY }}-install
+    - name: Build fizz
+      if: ${{ steps.paths.outputs.fizz_SOURCE && ! steps.restore_fizz.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fizz
-    - name: Build wangle
+    - name: Save fizz to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.fizz_SOURCE && ! steps.restore_fizz.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.fizz_INSTALL }}
+       key: ${{ steps.paths.outputs.fizz_CACHE_KEY }}-install
+    - name: Restore wangle from cache
+      id: restore_wangle
       if: ${{ steps.paths.outputs.wangle_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.wangle_INSTALL }}
+       key: ${{ steps.paths.outputs.wangle_CACHE_KEY }}-install
+    - name: Build wangle
+      if: ${{ steps.paths.outputs.wangle_SOURCE && ! steps.restore_wangle.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests wangle
-    - name: Build mvfst
+    - name: Save wangle to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.wangle_SOURCE && ! steps.restore_wangle.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.wangle_INSTALL }}
+       key: ${{ steps.paths.outputs.wangle_CACHE_KEY }}-install
+    - name: Restore mvfst from cache
+      id: restore_mvfst
       if: ${{ steps.paths.outputs.mvfst_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.mvfst_INSTALL }}
+       key: ${{ steps.paths.outputs.mvfst_CACHE_KEY }}-install
+    - name: Build mvfst
+      if: ${{ steps.paths.outputs.mvfst_SOURCE && ! steps.restore_mvfst.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests mvfst
-    - name: Build libffi
-      if: ${{ steps.paths.outputs.libffi_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests libffi
-    - name: Build ncurses
-      if: ${{ steps.paths.outputs.ncurses_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests ncurses
-    - name: Build python
-      if: ${{ steps.paths.outputs.python_SOURCE }}
-      run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests python
-    - name: Build fbthrift
+    - name: Save mvfst to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.mvfst_SOURCE && ! steps.restore_mvfst.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.mvfst_INSTALL }}
+       key: ${{ steps.paths.outputs.mvfst_CACHE_KEY }}-install
+    - name: Restore fbthrift from cache
+      id: restore_fbthrift
       if: ${{ steps.paths.outputs.fbthrift_SOURCE }}
+      uses: actions/cache/restore@v4
+      with:
+       path: ${{ steps.paths.outputs.fbthrift_INSTALL }}
+       key: ${{ steps.paths.outputs.fbthrift_CACHE_KEY }}-install
+    - name: Build fbthrift
+      if: ${{ steps.paths.outputs.fbthrift_SOURCE && ! steps.restore_fbthrift.outputs.cache-hit }}
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --no-tests fbthrift
+    - name: Save fbthrift to cache
+      uses: actions/cache/save@v4
+      if: ${{ steps.paths.outputs.fbthrift_SOURCE && ! steps.restore_fbthrift.outputs.cache-hit }}
+      with:
+       path: ${{ steps.paths.outputs.fbthrift_INSTALL }}
+       key: ${{ steps.paths.outputs.fbthrift_CACHE_KEY }}-install
     - name: Build cachelib
       run: python3 build/fbcode_builder/getdeps.py --allow-system-packages build --src-dir=. cachelib  --project-install-prefix cachelib:/usr/local
     - name: Copy artifacts