diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c728bff2f..c6bd6b921 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
 jobs:
   tests:
-    runs-on: ubuntu-22.04
+    runs-on: buildjet-16vcpu-ubuntu-2204
     defaults:
       run:
         working-directory: pgml-extension
@@ -24,7 +24,8 @@ jobs:
               postgresql-server-dev-14 \
               pkg-config \
               python3-pip \
-              python3
+              python3 \
+              mold
           sudo pip3 install -r requirements.txt
       - name: Cache dependencies
         uses: actions/cache@v3
diff --git a/.github/workflows/package-extension.yml b/.github/workflows/package-extension.yml
index 0844dd177..142809ed8 100644
--- a/.github/workflows/package-extension.yml
+++ b/.github/workflows/package-extension.yml
@@ -10,7 +10,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: ["ubuntu-22.04", "buildjet-4vcpu-ubuntu-2204-arm"]
+        os: ["buildjet-16vcpu-ubuntu-2204-arm", "buildjet-16vcpu-ubuntu-2204-arm"]
     runs-on: ${{ matrix.os }}
     defaults:
       run:
@@ -74,7 +74,8 @@ jobs:
           python3-pip \
           libpython3.10-dev \
           python3.10-dev \
-          ruby
+          ruby \
+          mold
 
         curl -sLO https://github.com/deb-s3/deb-s3/releases/download/0.11.4/deb-s3-0.11.4.gem
         sudo gem install deb-s3-0.11.4.gem
diff --git a/pgml-extension/.cargo/config b/pgml-extension/.cargo/config
index 2b25fcd1d..4739f795d 100644
--- a/pgml-extension/.cargo/config
+++ b/pgml-extension/.cargo/config
@@ -1,3 +1,9 @@
 [build]
 # Postgres symbols won't be available until runtime
 rustflags = ["-C", "link-args=-Wl,-undefined,dynamic_lookup"]
+
+[target.x86_64-unknown-linux-gnu]
+rustflags = ["-C", "link-args=-Wl,-undefined,dynamic_lookup,-fuse-ld=/usr/bin/mold"]
+
+[target.aarch64-unknown-linux-gnu]
+rustflags = ["-C", "link-args=-Wl,-undefined,dynamic_lookup,-fuse-ld=/usr/bin/mold"]