diff --git a/src/colorer/utils/Environment.cpp b/src/colorer/utils/Environment.cpp
index 5fb09f6..de90164 100644
--- a/src/colorer/utils/Environment.cpp
+++ b/src/colorer/utils/Environment.cpp
@@ -1,10 +1,10 @@
 #include "colorer/utils/Environment.h"
+#include <regex>
 #ifdef WIN32
 #include <windows.h>
 #include <cwchar>
-#else
-#include <regex>
 #endif
+
 namespace colorer {
 fs::path Environment::to_filepath(const UnicodeString* str)
 {
@@ -159,4 +159,23 @@ UnicodeString Environment::getAbsolutePath(const UnicodeString& basePath, const
   newPath.append(relPath);
   return newPath;
 }
+
+UnicodeString Environment::expandSpecialEnvironment(const UnicodeString& path)
+{
+  COLORER_LOG_DEBUG("expand system environment for '%'", path);
+  std::smatch matcher;
+  std::string result;
+  auto text = UStr::to_stdstr(&path);
+  static const std::regex env_re {R"--(\$([[:alpha:]]\w*)\b)--"};
+  while (std::regex_search(text, matcher, env_re)) {
+    result += matcher.prefix().str();
+    auto a = getOSVariable(matcher[1].str().c_str());
+    result += UStr::to_stdstr(a);
+    text = matcher.suffix().str();
+  }
+  result += text;
+
+  COLORER_LOG_DEBUG("result of expand '%'", result);
+  return UnicodeString(result.c_str());
+}
 }  // namespace colorer
\ No newline at end of file
diff --git a/src/colorer/utils/Environment.h b/src/colorer/utils/Environment.h
index ded7972..74de02e 100644
--- a/src/colorer/utils/Environment.h
+++ b/src/colorer/utils/Environment.h
@@ -26,6 +26,8 @@ class Environment
                                                      const UnicodeString& extension);
   static bool isRegularFile(const UnicodeString* basePath, const UnicodeString* relPath, UnicodeString& fullPath);
   static UnicodeString getAbsolutePath(const UnicodeString& basePath, const UnicodeString& relPath);
+
+  static UnicodeString expandSpecialEnvironment(const UnicodeString& path);
 };
 
 }  // namespace colorer
diff --git a/src/colorer/xml/libxml2/LibXmlReader.cpp b/src/colorer/xml/libxml2/LibXmlReader.cpp
index d8e6497..4367784 100644
--- a/src/colorer/xml/libxml2/LibXmlReader.cpp
+++ b/src/colorer/xml/libxml2/LibXmlReader.cpp
@@ -141,10 +141,17 @@ xmlParserInputPtr LibXmlReader::xmlMyExternalEntityLoader(const char* URL, const
   //  путем склейки пути от текущего файла и указанного в external entity.
   // При этом в параметрах функции или в контексте нет ни пути до исходного файла, ни до файла в entity
 
-  const UnicodeString string_url(URL);
+  UnicodeString string_url(URL);
 
+  if (!is_full_path && string_url.startsWith(u"env:")) {
+    const auto exp = colorer::Environment::expandSpecialEnvironment(string_url);
+    string_url = UnicodeString(exp, 4);
+  }
 #ifdef COLORER_FEATURE_ZIPINPUTSOURCE
   if (string_url.startsWith(jar) || current_file->startsWith(jar)) {
+    if (!is_full_path) {
+      string_url = colorer::Environment::expandSpecialEnvironment(string_url);
+    }
     auto paths = LibXmlInputSource::getFullPathFromPathJar(string_url, is_full_path ? nullptr : current_file.get());
     is_full_path = false;
     xmlParserInputPtr ret = nullptr;
@@ -156,7 +163,7 @@ xmlParserInputPtr LibXmlReader::xmlMyExternalEntityLoader(const char* URL, const
   }
 #endif
   is_full_path = false;
-  xmlParserInputPtr ret = xmlNewInputFromFile(ctxt, URL);
+  xmlParserInputPtr ret = xmlNewInputFromFile(ctxt, UStr::to_stdstr(&string_url).c_str());
 
   return ret;
 }