diff --git a/.cargo/config.toml b/.cargo/config.toml
index 062840f..ab5218c 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -12,7 +12,7 @@ rustflags = [
     "-Wclippy::dbg_macro",
     "-Wclippy::debug_assert_with_mut_call",
     "-Wclippy::doc_markdown",
-    "-Wclippy::empty_enum",
+    "-Wclippy::empty_enums",
     "-Wclippy::enum_glob_use",
     "-Wclippy::exit",
     "-Wclippy::expl_impl_clone_on_copy",
@@ -63,7 +63,6 @@ rustflags = [
     "-Wclippy::string_add_assign",
     "-Wclippy::string_add",
     "-Wclippy::string_lit_as_bytes",
-    "-Wclippy::string_to_string",
     "-Wclippy::todo",
     "-Wclippy::trait_duplication_in_bounds",
     "-Wclippy::unimplemented",
diff --git a/spirv-tools-sys/src/shared.rs b/spirv-tools-sys/src/shared.rs
index 07c4a5e..23be524 100644
--- a/spirv-tools-sys/src/shared.rs
+++ b/spirv-tools-sys/src/shared.rs
@@ -7,7 +7,7 @@ use std::fmt;
 /// This enum MUST be kept in sync with the `typedef enum spv_target_env` in
 /// `spirv-tools-sys/spirv-tools/include/spirv-tools/libspirv.h`, it is being
 /// sent across the ffi boundary.
-#[derive(Copy, Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
 #[repr(C)]
 #[allow(non_camel_case_types, clippy::upper_case_acronyms)]
 pub enum TargetEnv {
@@ -56,6 +56,7 @@ pub enum TargetEnv {
     /// Vulkan 1.1 with `VK_KHR_spirv_1_4`, i.e. SPIR-V 1.4 binary.
     Vulkan_1_1_Spirv_1_4,
     /// SPIR-V 1.5 latest revision, no other restrictions.
+    #[default] // This is the default target environment for (AFAICT) all spirv-tools
     Universal_1_5,
     /// Vulkan 1.2 latest revision.
     Vulkan_1_2,
@@ -110,13 +111,6 @@ impl TargetEnv {
     }
 }
 
-impl Default for TargetEnv {
-    fn default() -> Self {
-        // This is the default target environment for (AFAICT) all spirv-tools
-        Self::Universal_1_5
-    }
-}
-
 impl std::str::FromStr for TargetEnv {
     type Err = SpirvResult;