diff --git a/build_system/src/build.rs b/build_system/src/build.rs
index 2d66fd89fb9..a4ea5107a05 100644
--- a/build_system/src/build.rs
+++ b/build_system/src/build.rs
@@ -1,5 +1,5 @@
 use crate::config::{Channel, ConfigInfo};
-use crate::utils::{run_command, run_command_with_output_and_env, walk_dir};
+use crate::utils::{create_dir, run_command, run_command_with_output_and_env, walk_dir};
 use std::collections::HashMap;
 use std::ffi::OsStr;
 use std::fs;
@@ -103,6 +103,7 @@ fn cleanup_sysroot_previous_build(start_dir: &Path) {
 
 pub fn build_sysroot(env: &HashMap<String, String>, config: &ConfigInfo) -> Result<(), String> {
     let start_dir = Path::new("build_sysroot");
+
     cleanup_sysroot_previous_build(&start_dir);
 
     // Builds libs
@@ -136,13 +137,7 @@ pub fn build_sysroot(env: &HashMap<String, String>, config: &ConfigInfo) -> Resu
 
     // Copy files to sysroot
     let sysroot_path = start_dir.join(format!("sysroot/lib/rustlib/{}/lib/", config.target_triple));
-    fs::create_dir_all(&sysroot_path).map_err(|error| {
-        format!(
-            "Failed to create directory `{}`: {:?}",
-            sysroot_path.display(),
-            error
-        )
-    })?;
+    create_dir(&sysroot_path)?;
     let copier = |dir_to_copy: &Path| {
         // FIXME: should not use shell command!
         run_command(&[&"cp", &"-r", &dir_to_copy, &sysroot_path], None).map(|_| ())
@@ -155,13 +150,7 @@ pub fn build_sysroot(env: &HashMap<String, String>, config: &ConfigInfo) -> Resu
 
     // Copy the source files to the sysroot (Rust for Linux needs this).
     let sysroot_src_path = start_dir.join("sysroot/lib/rustlib/src/rust");
-    fs::create_dir_all(&sysroot_src_path).map_err(|error| {
-        format!(
-            "Failed to create directory `{}`: {:?}",
-            sysroot_src_path.display(),
-            error
-        )
-    })?;
+    create_dir(&sysroot_src_path)?;
     run_command(
         &[
             &"cp",
@@ -216,12 +205,7 @@ fn build_codegen(args: &mut BuildArg) -> Result<(), String> {
     // We voluntarily ignore the error.
     let _ = fs::remove_dir_all("target/out");
     let gccjit_target = "target/out/gccjit";
-    fs::create_dir_all(gccjit_target).map_err(|error| {
-        format!(
-            "Failed to create directory `{}`: {:?}",
-            gccjit_target, error
-        )
-    })?;
+    create_dir(gccjit_target)?;
 
     println!("[BUILD] sysroot");
     build_sysroot(&env, &args.config_info)?;
diff --git a/build_system/src/config.rs b/build_system/src/config.rs
index 4cda356301a..2e6d1b038c1 100644
--- a/build_system/src/config.rs
+++ b/build_system/src/config.rs
@@ -1,5 +1,5 @@
 use crate::utils::{
-    create_symlink, get_os_name, run_command_with_output, rustc_version_info, split_args,
+    create_dir, create_symlink, get_os_name, run_command_with_output, rustc_version_info, split_args,
 };
 use std::collections::HashMap;
 use std::env as std_env;
@@ -228,13 +228,7 @@ fn download_gccjit_if_needed(&mut self) -> Result<(), String> {
 
         let output_dir = output_dir.join(&commit);
         if !output_dir.is_dir() {
-            std::fs::create_dir_all(&output_dir).map_err(|err| {
-                format!(
-                    "failed to create folder `{}`: {:?}",
-                    output_dir.display(),
-                    err,
-                )
-            })?;
+            create_dir(&output_dir)?;
         }
         let output_dir = output_dir.canonicalize().map_err(|err| {
             format!(
diff --git a/build_system/src/prepare.rs b/build_system/src/prepare.rs
index 821c793c7e5..fd577fa9434 100644
--- a/build_system/src/prepare.rs
+++ b/build_system/src/prepare.rs
@@ -1,6 +1,6 @@
 use crate::rustc_info::get_rustc_path;
 use crate::utils::{
-    cargo_install, git_clone_root_dir, remove_file, run_command, run_command_with_output, walk_dir,
+    cargo_install, create_dir, git_clone_root_dir, remove_file, run_command, run_command_with_output, walk_dir,
 };
 
 use std::fs;
@@ -41,13 +41,7 @@ fn prepare_libcore(
     }
 
     let sysroot_library_dir = sysroot_dir.join("library");
-    fs::create_dir_all(&sysroot_library_dir).map_err(|error| {
-        format!(
-            "Failed to create folder `{}`: {:?}",
-            sysroot_library_dir.display(),
-            error,
-        )
-    })?;
+    create_dir(&sysroot_library_dir)?;
 
     run_command(
         &[&"cp", &"-r", &rustlib_dir.join("library"), &sysroot_dir],
diff --git a/build_system/src/test.rs b/build_system/src/test.rs
index 0895dc6bff7..c0cb6c8f239 100644
--- a/build_system/src/test.rs
+++ b/build_system/src/test.rs
@@ -1,13 +1,13 @@
 use crate::build;
 use crate::config::{Channel, ConfigInfo};
 use crate::utils::{
-    get_toolchain, git_clone, git_clone_root_dir, remove_file, run_command, run_command_with_env,
+    create_dir, get_toolchain, git_clone, git_clone_root_dir, remove_file, run_command, run_command_with_env,
     run_command_with_output_and_env, rustc_version_info, split_args, walk_dir,
 };
 
 use std::collections::{BTreeSet, HashMap};
 use std::ffi::OsStr;
-use std::fs::{create_dir_all, remove_dir_all, File};
+use std::fs::{remove_dir_all, File};
 use std::io::{BufRead, BufReader};
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
@@ -211,8 +211,7 @@ fn build_if_no_backend(env: &Env, args: &TestArg) -> Result<(), String> {
 fn clean(_env: &Env, args: &TestArg) -> Result<(), String> {
     let _ = std::fs::remove_dir_all(&args.config_info.cargo_target_dir);
     let path = Path::new(&args.config_info.cargo_target_dir).join("gccjit");
-    std::fs::create_dir_all(&path)
-        .map_err(|error| format!("failed to create folder `{}`: {:?}", path.display(), error))
+    create_dir(&path)
 }
 
 fn mini_tests(env: &Env, args: &TestArg) -> Result<(), String> {
@@ -715,8 +714,7 @@ fn test_projects(env: &Env, args: &TestArg) -> Result<(), String> {
     };
 
     let projects_path = Path::new("projects");
-    create_dir_all(projects_path)
-        .map_err(|err| format!("Failed to create directory `projects`: {}", err))?;
+    create_dir(projects_path)?;
 
     let nb_parts = args.nb_parts.unwrap_or(0);
     if nb_parts > 0 {
diff --git a/build_system/src/utils.rs b/build_system/src/utils.rs
index d9c13fd143d..cd7c035e690 100644
--- a/build_system/src/utils.rs
+++ b/build_system/src/utils.rs
@@ -307,6 +307,12 @@ pub fn git_clone(
     git_clone_inner(to_clone, dest, shallow_clone, repo_name)
 }
 
+pub fn create_dir<P: AsRef<Path>>(path: P) -> Result<(), String> {
+    fs::create_dir_all(&path).map_err(|error| {
+        format!("Failed to create directory `{}`: {:?}", path.as_ref().display(), error)
+    })
+}
+
 /// This function differs from `git_clone` in how it handles *where* the repository will be cloned.
 /// In `git_clone`, it is cloned in the provided path. In this function, the path you provide is
 /// the parent folder. So if you pass "a" as folder and try to clone "b.git", it will be cloned into