diff --git a/build_system/utils.rs b/build_system/utils.rs
index 92a33b8bf4d..0b6f344453b 100644
--- a/build_system/utils.rs
+++ b/build_system/utils.rs
@@ -168,6 +168,8 @@ pub(crate) fn git_command<'a>(repo_dir: impl Into<Option<&'a Path>>, cmd: &str)
         .arg("user.email=dummy@example.com")
         .arg("-c")
         .arg("core.autocrlf=false")
+        .arg("-c")
+        .arg("commit.gpgSign=false")
         .arg(cmd);
     if let Some(repo_dir) = repo_dir.into() {
         git_cmd.current_dir(repo_dir);
diff --git a/scripts/setup_rust_fork.sh b/scripts/setup_rust_fork.sh
index 2cbbbdded5b..e6bbac647e5 100644
--- a/scripts/setup_rust_fork.sh
+++ b/scripts/setup_rust_fork.sh
@@ -10,7 +10,8 @@ git fetch
 git checkout -- .
 git checkout "$(rustc -V | cut -d' ' -f3 | tr -d '(')"
 
-git -c user.name=Dummy -c user.email=dummy@example.com am ../patches/*-stdlib-*.patch
+git -c user.name=Dummy -c user.email=dummy@example.com -c commit.gpgSign=false \
+    am ../patches/*-stdlib-*.patch
 
 git apply - <<EOF
 diff --git a/library/alloc/Cargo.toml b/library/alloc/Cargo.toml