Use preinstalled Rust in CI

Author: mszabo-wikia

.github/workflows/ubuntu.yml

@@ -31,6 +31,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: "recursive"
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: nightly-2025-09-01
       - name: Installing HHVM deps and building HHVM
         uses: docker://ubuntu:noble
         env:

ci/ubuntu-24.04-noble/debian/rules

@@ -13,6 +13,8 @@ override_dh_auto_configure:
 	-Wno-dev \
 	-DCMAKE_INSTALL_PREFIX=/opt/hhvm/$(DEB_VERSION_UPSTREAM) \
 	-DMYSQL_UNIX_SOCK_ADDR=/var/run/mysqld/mysqld.sock \
+	-DRUSTC_EXECUTABLE=$(which rustc) \
+	-DCARGO_EXECUTABLE=$(which cargo) \
 	-DCMAKE_BUILD_TYPE=RelWithDebInfo \
 	-DCLANG_FORCE_LIBCPP=On \
 	-DFORCE_BUNDLED_LZ4=Off \