diff --git a/.cirrus.yml b/.cirrus.yml
index 5d16dce921a..fb9b038a8bd 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -1,3 +1,10 @@
+env:
+  # Temporary workaround for error `error: sysinfo not supported on
+  # this platform` seen on FreeBSD platforms, affecting Rustup
+  #
+  # References: https://github.com/rust-lang/rustup/issues/2774
+  RUSTUP_IO_THREADS: 1
+
 task:
   name: stable x86_64-unknown-freebsd-12
   freebsd_instance: