diff --git a/hotdoc/extensions/c/c_extension.py b/hotdoc/extensions/c/c_extension.py
index 1cfd5b3..1e1926f 100644
--- a/hotdoc/extensions/c/c_extension.py
+++ b/hotdoc/extensions/c/c_extension.py
@@ -44,14 +44,6 @@ from hotdoc.utils.loggable import (info as core_info, warn, Logger,
                                    debug as core_debug)
 
 
-LLVM_CONFIG = os.environ.get("LLVM_CONFIG")
-if LLVM_CONFIG is None:
-    LLVM_CONFIG = shutil.which('llvm-config')
-
-if LLVM_CONFIG is None:
-    raise ImportError()
-
-
 def ast_node_is_function_pointer(ast_node):
     if ast_node.kind == cindex.TypeKind.POINTER and \
             ast_node.get_pointee().get_result().kind != \
@@ -80,42 +72,26 @@ Logger.register_warning_code('clang-headers-not-found', HotdocException,
                              'c-extension')
 
 
-CLANG_HEADERS_WARNING = (
-    'Did not find clang headers. Please report a bug with the output of the'
-    '\'llvm-config --version\' and \'llvm-config --prefix\' commands')
-
-
 def get_clang_headers():
     try:
         # Clang 5.0+ can tell us directly
         resource_dir = subprocess.check_output(
-            ['clang', '--print-resource-dir']).strip().decode()
+            ['@clang@', '--print-resource-dir']).strip().decode()
         if len(resource_dir) > 0:
             include_dir = os.path.join(resource_dir, 'include')
             if os.path.exists(include_dir):
                 return include_dir
     except subprocess.CalledProcessError:
         pass
-    version = subprocess.check_output(
-        [LLVM_CONFIG, '--version']).strip().decode()
-    prefix = subprocess.check_output(
-        [LLVM_CONFIG, '--prefix']).strip().decode()
-    versions = (version, version.split('.').pop(0))
-    for (ver, lib) in itertools.product(
-            versions,
-            ['lib', 'lib64']):
-        p = os.path.join(prefix, lib, 'clang', ver, 'include')
-        if os.path.exists(p):
-            return p
 
-    warn('clang-headers-not-found', CLANG_HEADERS_WARNING)
+    warn('clang-headers-not-found', 'Did not find clang headers. Make sure you\'re using Clang 5.0+')
 
 
 CLANG_HEADERS = get_clang_headers()
 
 
 def get_clang_libdir():
-    return subprocess.check_output([LLVM_CONFIG, '--libdir']).strip().decode()
+    return '@libclang_lib_dir@'
 
 
 class ClangScanner(object):
diff --git a/hotdoc/extensions/c/clang/cindex.py b/hotdoc/extensions/c/clang/cindex.py
index fc93fda..0a16651 100644
--- a/hotdoc/extensions/c/clang/cindex.py
+++ b/hotdoc/extensions/c/clang/cindex.py
@@ -3949,6 +3949,8 @@ class Config:
 
         if Config.library_path:
             file = Config.library_path + '/' + file
+        else:
+            file = "@libclang_lib_dir@" + '/' + file
 
         return file