diff --git a/rust_src/crates/git/src/lib.rs b/rust_src/crates/git/src/lib.rs
index 85ae87e4cfc..0f62ad2ed2a 100755
--- a/rust_src/crates/git/src/lib.rs
+++ b/rust_src/crates/git/src/lib.rs
@@ -9,4 +9,4 @@ extern crate lisp_util;
 mod repository;
 
 #[cfg(not(test))]
-include!(concat!(env!("CARGO_MANIFEST_DIR"), "/out/c_exports.rs"));
+include!(concat!(env!("OUT_DIR"), "/c_exports.rs"));
diff --git a/rust_src/crates/git/src/repository.rs b/rust_src/crates/git/src/repository.rs
index 372ea747164..c2ea2abad88 100644
--- a/rust_src/crates/git/src/repository.rs
+++ b/rust_src/crates/git/src/repository.rs
@@ -16,7 +16,4 @@ pub fn git_init(path: LispStringRef) -> LispStringRef {
     }
 }
 
-include!(concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/out/repository_exports.rs"
-));
+include!(concat!(env!("OUT_DIR"), "/repository_exports.rs"));
diff --git a/rust_src/crates/js/src/lib.rs b/rust_src/crates/js/src/lib.rs
index 1dd3ceb0c1a..175a9c714da 100755
--- a/rust_src/crates/js/src/lib.rs
+++ b/rust_src/crates/js/src/lib.rs
@@ -15,4 +15,4 @@ mod javascript;
 mod subcommands;
 
 #[cfg(not(test))]
-include!(concat!(env!("CARGO_MANIFEST_DIR"), "/out/c_exports.rs"));
+include!(concat!(env!("OUT_DIR"), "/c_exports.rs"));
diff --git a/rust_src/crates/lsp_json/src/lib.rs b/rust_src/crates/lsp_json/src/lib.rs
index 0df139db451..0d3dbf1e8e9 100755
--- a/rust_src/crates/lsp_json/src/lib.rs
+++ b/rust_src/crates/lsp_json/src/lib.rs
@@ -13,4 +13,4 @@ extern crate lisp_util;
 pub mod parsing;
 
 #[cfg(not(test))]
-include!(concat!(env!("CARGO_MANIFEST_DIR"), "/out/c_exports.rs"));
+include!(concat!(env!("OUT_DIR"), "/c_exports.rs"));
diff --git a/rust_src/crates/lsp_json/src/parsing.rs b/rust_src/crates/lsp_json/src/parsing.rs
index 77fe30063b9..d73e4386468 100644
--- a/rust_src/crates/lsp_json/src/parsing.rs
+++ b/rust_src/crates/lsp_json/src/parsing.rs
@@ -683,7 +683,4 @@ fn init_syms() {
     def_lisp_sym!(Qarray, "array");
 }
 
-include!(concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/out/parsing_exports.rs"
-));
+include!(concat!(env!("OUT_DIR"), "/parsing_exports.rs"));
diff --git a/rust_src/crates/ng_async/src/lib.rs b/rust_src/crates/ng_async/src/lib.rs
index 08292a29d55..7da0bba8cb0 100755
--- a/rust_src/crates/ng_async/src/lib.rs
+++ b/rust_src/crates/ng_async/src/lib.rs
@@ -10,4 +10,4 @@ extern crate lisp_util;
 pub mod ng_async;
 
 #[cfg(not(test))]
-include!(concat!(env!("CARGO_MANIFEST_DIR"), "/out/c_exports.rs"));
+include!(concat!(env!("OUT_DIR"), "/c_exports.rs"));
diff --git a/rust_src/crates/ng_async/src/ng_async.rs b/rust_src/crates/ng_async/src/ng_async.rs
index cf6db0aab93..c010b369ebd 100644
--- a/rust_src/crates/ng_async/src/ng_async.rs
+++ b/rust_src/crates/ng_async/src/ng_async.rs
@@ -500,7 +500,4 @@ fn init_syms() {
     def_lisp_sym!(QCoutchannel, "outchannel");
 }
 
-include!(concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/out/ng_async_exports.rs"
-));
+include!(concat!(env!("OUT_DIR"), "/ng_async_exports.rs"));
diff --git a/rust_src/crates/ng_module/src/lib.rs b/rust_src/crates/ng_module/src/lib.rs
index a3d1207e862..ffca336fd3c 100755
--- a/rust_src/crates/ng_module/src/lib.rs
+++ b/rust_src/crates/ng_module/src/lib.rs
@@ -7,4 +7,4 @@ extern crate lisp_util;
 mod ng_module;
 
 #[cfg(not(test))]
-include!(concat!(env!("CARGO_MANIFEST_DIR"), "/out/c_exports.rs"));
+include!(concat!(env!("OUT_DIR"), "/c_exports.rs"));
diff --git a/rust_src/crates/ng_module/src/ng_module.rs b/rust_src/crates/ng_module/src/ng_module.rs
index f5a93b6f004..13e61cc2bdd 100644
--- a/rust_src/crates/ng_module/src/ng_module.rs
+++ b/rust_src/crates/ng_module/src/ng_module.rs
@@ -74,7 +74,4 @@ unsafe extern "C" fn ng_module_access_current_buffer_contents(
     *after_gap_size = z_byte - gpt_byte;
 }
 
-include!(concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/out/ng_module_exports.rs"
-));
+include!(concat!(env!("OUT_DIR"), "/ng_module_exports.rs"));
diff --git a/rust_src/crates/webrender/src/lib.rs b/rust_src/crates/webrender/src/lib.rs
index 2b5e9471d4b..74c4e1e423e 100644
--- a/rust_src/crates/webrender/src/lib.rs
+++ b/rust_src/crates/webrender/src/lib.rs
@@ -68,4 +68,4 @@ pub use crate::platform::macos;
 pub use crate::wrterm::{tip_frame, wr_display_list};
 
 #[cfg(not(test))]
-include!(concat!(env!("CARGO_MANIFEST_DIR"), "/out/c_exports.rs"));
+include!(concat!(env!("OUT_DIR"), "/c_exports.rs"));
diff --git a/rust_src/crates/webrender/src/wrterm.rs b/rust_src/crates/webrender/src/wrterm.rs
index 491c502539d..6b5eb2cbfd1 100644
--- a/rust_src/crates/webrender/src/wrterm.rs
+++ b/rust_src/crates/webrender/src/wrterm.rs
@@ -1009,7 +1009,4 @@ pub extern "C" fn syms_of_wrterm() {
     syms_of_wrfont();
 }
 
-include!(concat!(
-    env!("CARGO_MANIFEST_DIR"),
-    "/out/wrterm_exports.rs"
-));
+include!(concat!(env!("OUT_DIR"), "/wrterm_exports.rs"));
diff --git a/rust_src/ng-bindgen/lib.rs b/rust_src/ng-bindgen/lib.rs
index 7ae411f9ec4..c2b0759eb9c 100644
--- a/rust_src/ng-bindgen/lib.rs
+++ b/rust_src/ng-bindgen/lib.rs
@@ -495,8 +495,9 @@ fn build_ignored_crates(path: &PathBuf) -> bool {
 pub fn generate_crate_exports(path: &PathBuf) -> Result<(), BuildError> {
     let modules = find_crate_modules(&path.join("src"))?;
 
-    let _ = fs::create_dir(path.join("out"));
-    let mut out_file = File::create(path.join("out").join("c_exports.rs"))?;
+    let out_path: PathBuf = [&env_var("OUT_DIR")].iter().collect();
+    let mut out_file = File::create(out_path.join("c_exports.rs"))?;
+
     generate_crate_c_export_file(&out_file, &modules)?;
 
     let crate_name = get_crate_name(path);
@@ -506,7 +507,7 @@ pub fn generate_crate_exports(path: &PathBuf) -> Result<(), BuildError> {
         crate_name
     )?;
 
-    write_lisp_fns(&path.join("out"), &out_file, &modules)?;
+    write_lisp_fns(&out_path, &out_file, &modules)?;
 
     write!(out_file, "}}\n")?;
 
@@ -516,7 +517,7 @@ pub fn generate_crate_exports(path: &PathBuf) -> Result<(), BuildError> {
 fn get_crate_name(path: &PathBuf) -> String {
     let manifest = Manifest::from_path(path.join("Cargo.toml")).unwrap();
     match manifest.package {
-        Some(package) => package.name,
+        Some(package) => package.name.replace('-', "_"),
         None => path_as_str(path.file_name()).to_string(),
     }
 }
diff --git a/src/Makefile.in b/src/Makefile.in
index c3844d1a397..239f1d6b10a 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -737,12 +737,6 @@ gl-stamp: $(libsrc)/make-docfile$(EXEEXT) $(GLOBAL_SOURCES)
 globals.h: gl-stamp; @true
 
 rust_srcdir=$(top_srcdir)/rust_src
-RUSTFLAGS_FILE=$(top_srcdir)/target/.rustflags
-$(RUSTFLAGS_FILE) : FORCE
-	mkdir -p $(dir $@)
-	echo "$(CARGO_FLAGS) $(RUSTFLAGS)" > $@.tmp
-	diff -q $@ $@.tmp || cp $@.tmp $@
-	rm -f $@.tmp
 
 HEADERS=$(wildcard $(srcdir)/*.h)
 
@@ -755,12 +749,9 @@ LIBEMACSNG_CARGO_FILES = $(sort $(shell find ${rust_srcdir} -type f \
 -name 'Cargo.*' -o -name "build.rs"))
 
 $(LIBEMACSNG_ARCHIVE) $(LIBEMACSNG_DEP-INFO): FORCE
-	touch $@
-	CARGO_BUILD_DEP_INFO_BASEDIR=$(realpath $(top_srcdir)) \
 	RUSTFLAGS="$(RUSTFLAGS)" \
 	EMACS_CFLAGS="$(EMACS_CFLAGS)" \
 	$(CARGO_BUILD) $(CARGO_FLAGS) --manifest-path $(cargo_manifest)
-	sed -i~ 's/rust_src\//..\/rust_src\//g' $(LIBEMACSNG_DEP-INFO)
 
 clippy:
 	RUSTFLAGS="$(RUSTFLAGS)" \
@@ -800,7 +791,7 @@ endif
 ## existence when setting Vinstallation_directory (FIXME?).
 ## This goes on to affect various things, and the emacs binary fails
 ## to start if Vinstallation_directory has the wrong value.
-temacs$(EXEEXT): $(LIBXMENU) $(ALLOBJS) $(LIBEMACSNG_ARCHIVE) $(RUSTFLAGS_FILE) $(LIBEGNU_ARCHIVE) $(EMACSRES) \
+temacs$(EXEEXT): $(LIBXMENU) $(ALLOBJS) $(LIBEMACSNG_ARCHIVE) $(LIBEGNU_ARCHIVE) $(EMACSRES) \
   $(charsets) $(charscript) ${emoji-zwj} $(MAKE_PDUMPER_FINGERPRINT)
 ifeq ($(HAVE_BE_APP),yes)
 	$(AM_V_CXXLD)$(CXX) -o $@.tmp \