From 665d9ec57cab09684b0983620ed8a54c5adbd4d9 Mon Sep 17 00:00:00 2001
From: Emily Albini <emily@oxidecomputer.com>
Date: Tue, 3 Mar 2026 21:40:54 +0100
Subject: [PATCH] relocate rust installation in reproducibility check

---
 .github/workflows/ci.yml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fcb193a412..4fd83c7844 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -242,6 +242,19 @@ jobs:
 
           echo "After time change: $(date)"
 
+      - name: Install Rust in a separate directory
+        run: |
+          rustup self uninstall -y
+
+          sudo mkdir /custom-rust
+          sudo chown $(id -u):$(id -g) /custom-rust
+
+          curl https://sh.rustup.rs | env \
+            CARGO_HOME=/custom-rust/cargo \
+            RUSTUP_HOME=/custom-rust/rustup \
+            RUSTUP_INIT_SKIP_PATH_CHECK=yes \
+            bash -s -- -y --no-modify-path --default-toolchain=none
+
       - name: Build a Hubris board
         run: |
           # Permissions of files created during the build process might leak into the artifacts.
@@ -249,6 +262,10 @@ jobs:
           # the reproducible-a job.
           umask 0077
 
+          export CARGO_HOME=/custom-rust/cargo
+          export RUSTUP_HOME=/custom-rust/rustup
+          export PATH="/custom-rust/cargo/bin:${PATH}"
+
           cd $CUSTOM_ROOT
           cargo xtask dist "$app_toml"
         env: