diff --git a/lang/rust-nightly/Makefile b/lang/rust-nightly/Makefile
index 3381b9b30b4a..f6ff2d58916d 100644
--- a/lang/rust-nightly/Makefile
+++ b/lang/rust-nightly/Makefile
@@ -16,7 +16,7 @@ MASTERDIR=	${.CURDIR}/../rust
 PATCHDIR=	${.CURDIR}/files
 DISTINFO_FILE=	${.CURDIR}/distinfo
 
-NIGHTLY_DATE=		2021-10-05
+NIGHTLY_DATE=		2021-10-06
 BOOTSTRAPS_DATE=	2021-09-08
 RUST_BOOTSTRAP_VERSION=	beta
 
diff --git a/lang/rust-nightly/distinfo b/lang/rust-nightly/distinfo
index 821949d4957f..7e4e0f6bcdd6 100644
--- a/lang/rust-nightly/distinfo
+++ b/lang/rust-nightly/distinfo
@@ -1,6 +1,6 @@
-TIMESTAMP = 1633514113
-SHA256 (rust/2021-10-05/rustc-nightly-src.tar.xz) = de6745a76edeaf447a9cfa9cc296b7a69550225323199741b44948a680c36197
-SIZE (rust/2021-10-05/rustc-nightly-src.tar.xz) = 122279192
+TIMESTAMP = 1633606205
+SHA256 (rust/2021-10-06/rustc-nightly-src.tar.xz) = 28c9e6ff47e07e4e68f8964488ad254369fa897f0e6943504a6b5e6cfc8609a8
+SIZE (rust/2021-10-06/rustc-nightly-src.tar.xz) = 122318988
 SHA256 (rust/2021-09-08/rustc-beta-x86_64-unknown-freebsd.tar.xz) = 4e01128800f479a96597ce7eee9d2e76a5128ae1c13a4e0e2eb52e36d43cf559
 SIZE (rust/2021-09-08/rustc-beta-x86_64-unknown-freebsd.tar.xz) = 120261460
 SHA256 (rust/2021-09-08/rust-std-beta-x86_64-unknown-freebsd.tar.xz) = 5faf349a9cc231c144c52de40f2a487a935c6f6146614547e64cabb26f037a23
diff --git a/lang/rust-nightly/files/patch-src_tools_cargo_src_cargo_sources_git_source.rs b/lang/rust-nightly/files/patch-src_tools_cargo_src_cargo_sources_git_source.rs
new file mode 100644
index 000000000000..7e0f0f6eca4d
--- /dev/null
+++ b/lang/rust-nightly/files/patch-src_tools_cargo_src_cargo_sources_git_source.rs
@@ -0,0 +1,45 @@
+We run cargo update during USES=cargo ports builds to update specific
+crates and patch Cargo.lock for us.  For normal crates this is based
+on what's available in the vendor dir.  For Git sources this pulls
+new changes from the net instead even if we replace the source with
+a static path in a patch section in the config file.  Add a hack
+to skip this.
+
+This is for experimentation to solve [1].  For this to maybe be
+useful for USES=cargo, the patch-in-config feature also needs to
+be stabilized first.  It will be available in Rust 1.56.
+
+[1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256581
+
+--- src/tools/cargo/src/cargo/sources/git/source.rs.orig	2021-10-04 20:59:57 UTC
++++ src/tools/cargo/src/cargo/sources/git/source.rs
+@@ -84,6 +84,9 @@ impl<'cfg> Debug for GitSource<'cfg> {
+ 
+ impl<'cfg> Source for GitSource<'cfg> {
+     fn query(&mut self, dep: &Dependency, f: &mut dyn FnMut(Summary)) -> CargoResult<()> {
++        if std::env::var("CARGO_FREEBSD_PORTS_SKIP_GIT_UPDATE").is_ok() {
++            return Ok(());
++        }
+         let src = self
+             .path_source
+             .as_mut()
+@@ -92,6 +95,9 @@ impl<'cfg> Source for GitSource<'cfg> {
+     }
+ 
+     fn fuzzy_query(&mut self, dep: &Dependency, f: &mut dyn FnMut(Summary)) -> CargoResult<()> {
++        if std::env::var("CARGO_FREEBSD_PORTS_SKIP_GIT_UPDATE").is_ok() {
++            return Ok(());
++        }
+         let src = self
+             .path_source
+             .as_mut()
+@@ -112,6 +118,9 @@ impl<'cfg> Source for GitSource<'cfg> {
+     }
+ 
+     fn update(&mut self) -> CargoResult<()> {
++        if std::env::var("CARGO_FREEBSD_PORTS_SKIP_GIT_UPDATE").is_ok() {
++            return Ok(());
++        }
+         let git_path = self.config.git_path();
+         let git_path = self.config.assert_package_cache_locked(&git_path);
+         let db_path = git_path.join("db").join(&self.ident);