diff --git a/projects/crates.io/lighthouse/package.yml b/projects/crates.io/lighthouse/package.yml
index 138cd270..b2d576cf 100644
--- a/projects/crates.io/lighthouse/package.yml
+++ b/projects/crates.io/lighthouse/package.yml
@@ -15,7 +15,14 @@ build:
     rust-lang.org/cargo: '*'
     cmake.org: ^3.12
     protobuf.dev: '*'
-  script: make CARGO_INSTALL_EXTRA_FLAGS="--root {{prefix}}"
+  script:
+    # curve25519-dalek 4.1.2 introduces some odd simd issues on x86-64
+    - run: sed -i
+        -e 's/version = "4.1.2"/version = "4.1.1"/'
+        -e 's/0a677b8922c94e01bdbb12126b0bc852f00447528dee1782229af9c720c3f348/e89b8c6a2e4b1f45971ad09761aafb85514a84744b67a95e32c3cc1352d1f65c/'
+        Cargo.lock
+      if: 5.0.0
+    - make CARGO_INSTALL_EXTRA_FLAGS="--root {{prefix}}"
   test: make test-release
 
 provides: