micropython-patch.diff

--- py/makeversionhdr.py
+++ py/makeversionhdr.py
@@ -21,7 +21,7 @@ def get_version_info_from_git():
 
     # Note: git describe doesn't work if no tag is available
     try:
-        git_tag = subprocess.check_output(["git", "describe", "--dirty", "--always"], stderr=subprocess.STDOUT, universal_newlines=True).strip()
+        git_tag = subprocess.check_output(["git", "describe", "--dirty", "--always"], stderr=subprocess.STDOUT, universal_newlines=True, cwd=os.path.dirname(sys.argv[0])).strip()
     except subprocess.CalledProcessError as er:
         if er.returncode == 128:
             # git exit code of 128 means no repository found
@@ -30,7 +30,7 @@ def get_version_info_from_git():
     except OSError:
         return None
     try:
-        git_hash = subprocess.check_output(["git", "rev-parse", "--short", "HEAD"], stderr=subprocess.STDOUT, universal_newlines=True).strip()
+        git_hash = subprocess.check_output(["git", "rev-parse", "--short", "HEAD"], stderr=subprocess.STDOUT, universal_newlines=True, cwd=os.path.dirname(sys.argv[0])).strip()
     except subprocess.CalledProcessError:
         git_hash = "unknown"
     except OSError:
@@ -38,9 +38,9 @@ def get_version_info_from_git():
 
     try:
         # Check if there are any modified files.
-        subprocess.check_call(["git", "diff", "--no-ext-diff", "--quiet", "--exit-code"], stderr=subprocess.STDOUT)
+        subprocess.check_call(["git", "diff", "--no-ext-diff", "--quiet", "--exit-code"], stderr=subprocess.STDOUT, cwd=os.path.dirname(sys.argv[0]))
         # Check if there are any staged files.
-        subprocess.check_call(["git", "diff-index", "--cached", "--quiet", "HEAD", "--"], stderr=subprocess.STDOUT)
+        subprocess.check_call(["git", "diff-index", "--cached", "--quiet", "HEAD", "--"], stderr=subprocess.STDOUT, cwd=os.path.dirname(sys.argv[0]))
     except subprocess.CalledProcessError:
         git_hash += "-dirty"
     except OSError: