diff --git a/hil-test/.cargo/config.toml b/hil-test/.cargo/config.toml
index b4e91a4d0dd..af2c1b6b4fa 100644
--- a/hil-test/.cargo/config.toml
+++ b/hil-test/.cargo/config.toml
@@ -20,3 +20,6 @@ rustflags = [
     "-C", "link-arg=-Tembedded-test.x",
 
 ]
+
+[unstable]
+build-std = ["core"]
diff --git a/hil-test/Cargo.toml b/hil-test/Cargo.toml
index 6eaa430087f..169c947c257 100644
--- a/hil-test/Cargo.toml
+++ b/hil-test/Cargo.toml
@@ -97,3 +97,6 @@ incremental      = false
 lto              = 'fat'
 opt-level        = 3     # <-
 overflow-checks  = false # <-
+
+[patch.crates-io]
+semihosting = { git = "https://github.com/taiki-e/semihosting", branch = "xtensa2" }