diff --git a/make.conf/00common b/make.conf/00common
index c70d8d1..f87c2ac 100644
--- a/make.conf/00common
+++ b/make.conf/00common
@@ -6,7 +6,7 @@ CXXFLAGS="${COMMON_FLAGS}"
 FCFLAGS="${COMMON_FLAGS}"
 FFLAGS="${COMMON_FLAGS}"
 
-RUSTFLAGS="-C target-cpu=native -C opt-level=3 -C linker=clang -C link-arg=-fuse-ld=mold"
+RUSTFLAGS="-C target-cpu=native -C opt-level=3 -C lto=thin -C linker=clang -C link-arg=-fuse-ld=mold"
 
 CC="clang"
 CXX="clang++"
diff --git a/package.use/gmp b/package.use/gmp
new file mode 100644
index 0000000..99cd08e
--- /dev/null
+++ b/package.use/gmp
@@ -0,0 +1 @@
+dev-libs/gmp -cpudetection