diff --git a/dev-lang/rust/rust-1.92.0_p1.ebuild b/dev-lang/rust/rust-1.92.0_p1.ebuild
index 2914a977ee62b..c24ef5c17c5fb 100644
--- a/dev-lang/rust/rust-1.92.0_p1.ebuild
+++ b/dev-lang/rust/rust-1.92.0_p1.ebuild
@@ -325,11 +325,6 @@ src_unpack() {
 }
 
 src_prepare() {
-	if [[ ${PV} = *9999* ]]; then
-		# We need to update / generate lockfiles for the workspace
-		${CARGO} generate-lockfile --offline || die "Failed to generate lockfiles"
-	fi
-
 	# Commit patches to the appropriate branch in proj/rust-patches.git
 	# then cut a new tag / tarball. Don't add patches to ${FILESDIR}
 	PATCHES=(
diff --git a/dev-lang/rust/rust-9999.ebuild b/dev-lang/rust/rust-9999.ebuild
index 1652bf4c51ddc..f7b0ecdb57a71 100644
--- a/dev-lang/rust/rust-9999.ebuild
+++ b/dev-lang/rust/rust-9999.ebuild
@@ -73,7 +73,7 @@ ALL_RUST_SYSROOTS=( "${ALL_RUST_SYSROOTS[@]/#/rust_sysroots_}" )
 LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"
 SLOT="${PV%%_*}" # Beta releases get to share the same SLOT as the eventual stable
 
-IUSE="big-endian clippy cpu_flags_x86_sse2 debug dist doc llvm-libunwind lto rustfmt rust-analyzer rust-src system-llvm test ${ALL_LLVM_TARGETS[*]} ${ALL_RUST_SYSROOTS[*]}"
+IUSE="big-endian clippy cpu_flags_x86_sse2 debug dist doc llvm-libunwind lto rustfmt rust-analyzer rust-src +system-llvm test ${ALL_LLVM_TARGETS[*]} ${ALL_RUST_SYSROOTS[*]}"
 
 if [[ ${PV} = *9999* ]]; then
 	# These USE flags require nightly rust