diff --git a/pkgs/development/compilers/llvm/update-git.py b/pkgs/development/compilers/llvm/update-git.py
index 9be43e8e1afb..9db47fac00db 100755
--- a/pkgs/development/compilers/llvm/update-git.py
+++ b/pkgs/development/compilers/llvm/update-git.py
@@ -14,7 +14,7 @@ from datetime import datetime
 from urllib.request import urlopen, Request
 
 
-DEFAULT_NIX = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'git/default.nix')
+DEFAULT_NIX = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'default.nix')
 
 
 def get_latest_chromium_build():
@@ -43,7 +43,7 @@ def get_current_revision():
     """Get the current revision of llvmPackages_git."""
     with open(DEFAULT_NIX) as f:
         for line in f:
-            rev = re.search(r'^    rev = "(.*)";', line)
+            rev = re.search(r'^      rev = "(.*)";', line)
             if rev:
                 return rev.group(1)
     sys.exit(1)
@@ -75,12 +75,13 @@ hash = nix_prefetch_url(f'https://github.com/llvm/llvm-project/archive/{commit["
 print('Updating default.nix...')
 with fileinput.FileInput(DEFAULT_NIX, inplace=True) as f:
     for line in f:
-        if match := re.search(r'^    rev-version = "unstable-(.+)";', line):
+        if match := re.search(r'^      rev-version = "unstable-(.+)";', line):
                 old_date = match.group(1)
-        result = re.sub(r'^    version = ".+";', f'    version = "{release_version}";', line)
-        result = re.sub(r'^    rev = ".*";', f'    rev = "{commit["sha"]}";', result)
-        result = re.sub(r'^    rev-version = ".+";', f'    rev-version = "{version}";', result)
-        result = re.sub(r'^    sha256 = ".+";', f'    sha256 = "{hash}";', result)
+        result = line
+        result = re.sub(r'^      version = ".+";', f'    version = "{release_version}";', result)
+        result = re.sub(r'^      rev = ".*";', f'      rev = "{commit["sha"]}";', result)
+        result = re.sub(r'^      rev-version = ".+";', f'      rev-version = "{version}";', result)
+        result = re.sub(r'^      sha256 = ".+";', f'      sha256 = "{hash}";', result)
         print(result, end='')
 # Commit the result:
 commit_message = f"llvmPackages_git: {old_date} -> {date}"