diff --git a/.github/workflows.src/ls-build.inc.yml b/.github/workflows.src/ls-build.inc.yml
index 4027df93703..ffcfc7ca8ff 100644
--- a/.github/workflows.src/ls-build.inc.yml
+++ b/.github/workflows.src/ls-build.inc.yml
@@ -126,6 +126,12 @@
 <% endif %>
 
     steps:
+    - uses: actions/checkout@v4
+      with:
+        sparse-checkout: rust-toolchain.toml
+        sparse-checkout-cone-mode: false
+        fetch-depth: 0
+
     - uses: actions/checkout@v4
       with:
         repository: edgedb/edgedb-pkg
diff --git a/.github/workflows/ls-nightly.yml b/.github/workflows/ls-nightly.yml
index 7b1090f49ab..e28c9933cfc 100644
--- a/.github/workflows/ls-nightly.yml
+++ b/.github/workflows/ls-nightly.yml
@@ -224,6 +224,12 @@ jobs:
 
 
     steps:
+    - uses: actions/checkout@v4
+      with:
+        sparse-checkout: rust-toolchain.toml
+        sparse-checkout-cone-mode: false
+        fetch-depth: 0
+
     - uses: actions/checkout@v4
       with:
         repository: edgedb/edgedb-pkg
@@ -279,6 +285,12 @@ jobs:
 
 
     steps:
+    - uses: actions/checkout@v4
+      with:
+        sparse-checkout: rust-toolchain.toml
+        sparse-checkout-cone-mode: false
+        fetch-depth: 0
+
     - uses: actions/checkout@v4
       with:
         repository: edgedb/edgedb-pkg