diff --git a/tools/auto_firmware_version.py b/tools/auto_firmware_version.py
index 2d25c1f4..629acfb2 100644
--- a/tools/auto_firmware_version.py
+++ b/tools/auto_firmware_version.py
@@ -7,7 +7,7 @@ installed_pkgs = {pkg.key for pkg in pkg_resources.working_set}
 missing_pkgs = required_pkgs - installed_pkgs
 
 if missing_pkgs:
-    env.Execute('$PYTHONEXE -m pip install dulwich --global-option="--pure"')
+    env.Execute('$PYTHONEXE -m pip install dulwich --global-option="--pure" --use-pep517')
 
 from dulwich import porcelain
 from dulwich.repo import Repo
diff --git a/tools/esp_merge_bin.py b/tools/esp_merge_bin.py
index 1fcaeea3..6cada46c 100644
--- a/tools/esp_merge_bin.py
+++ b/tools/esp_merge_bin.py
@@ -17,7 +17,7 @@ installed_pkgs = {pkg.key for pkg in pkg_resources.working_set}
 missing_pkgs = required_pkgs - installed_pkgs
 
 if missing_pkgs:
-    env.Execute('$PYTHONEXE -m pip install dulwich --global-option="--pure"')
+    env.Execute('$PYTHONEXE -m pip install dulwich --global-option="--pure" --use-pep517')
 
 from dulwich import porcelain
 from dulwich.repo import Repo