diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2cf7214e3a..a855d18d65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
 set(CMAKE_USER_MAKE_RULES_OVERRIDE ${CMAKE_SOURCE_DIR}/cmake/UserOverride.cmake)
 
 # We don't execute this if we have a tarball
-if (LPYTHON_BUILD_ALL)
+if (LCOMPILERS_BUILD_ALL)
   execute_process(COMMAND "build0.sh")
 endif()
 
@@ -24,11 +24,11 @@ if (NOT (CMAKE_BUILD_TYPE STREQUAL "Debug" OR
 endif ()
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-    set(LPYTHON_CXX_NO_RTTI_FLAG "-fno-rtti")
+    set(LCOMPILERS_CXX_NO_RTTI_FLAG "-fno-rtti")
 elseif (CMAKE_CXX_COMPILER_ID MATCHES Clang)
-    set(LPYTHON_CXX_NO_RTTI_FLAG "-fno-rtti")
+    set(LCOMPILERS_CXX_NO_RTTI_FLAG "-fno-rtti")
 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
-    set(LPYTHON_CXX_NO_RTTI_FLAG "/GR-")
+    set(LCOMPILERS_CXX_NO_RTTI_FLAG "/GR-")
 endif ()
 
 
@@ -70,8 +70,8 @@ endif()
 set(WITH_LCOMPILERS_ASSERT ${WITH_LCOMPILERS_ASSERT_DEFAULT}
     CACHE BOOL "Enable LCOMPILERS_ASSERT macro")
 
-# LPYTHON_STATIC_BIN
-set(LPYTHON_STATIC_BIN no CACHE BOOL "Build LPython as a static binary")
+# LCOMPILERS_STATIC_BIN
+set(LCOMPILERS_STATIC_BIN no CACHE BOOL "Build LPython as a static binary")
 
 # WITH_LCOMPILERS_BINARY_MODFILES
 set(WITH_LCOMPILERS_BINARY_MODFILES YES
@@ -89,7 +89,7 @@ set(WITH_LLVM no CACHE BOOL "Build with LLVM support")
 set(WITH_TARGET_AARCH64 no CACHE BOOL "Enable target AARCH64")
 set(WITH_TARGET_X86 no CACHE BOOL "Enable target X86")
 if (WITH_LLVM)
-    set(LPYTHON_LLVM_COMPONENTS core support mcjit orcjit native asmparser asmprinter)
+    set(LCOMPILERS_LLVM_COMPONENTS core support mcjit orcjit native asmparser asmprinter)
     find_package(LLVM REQUIRED)
     message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
     message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
@@ -108,7 +108,7 @@ if (WITH_LLVM)
             message(FATAL_ERROR "The selected LLVM library doesn't have support for AArch64 targets")
         endif()
 
-        list(APPEND LPYTHON_LLVM_COMPONENTS aarch64info aarch64utils aarch64desc aarch64asmparser aarch64codegen aarch64disassembler)
+        list(APPEND LCOMPILERS_LLVM_COMPONENTS aarch64info aarch64utils aarch64desc aarch64asmparser aarch64codegen aarch64disassembler)
         add_definitions("-DHAVE_TARGET_AARCH64=1")
     endif()
 
@@ -117,12 +117,12 @@ if (WITH_LLVM)
             message(FATAL_ERROR "The selected LLVM library doesn't have support for X86 targets")
         endif()
 
-        list(APPEND LPYTHON_LLVM_COMPONENTS x86info x86desc x86codegen x86asmparser x86disassembler)
+        list(APPEND LCOMPILERS_LLVM_COMPONENTS x86info x86desc x86codegen x86asmparser x86disassembler)
         add_definitions("-DHAVE_TARGET_X86=1")
     endif()
 
-    llvm_map_components_to_libnames(llvm_libs ${LPYTHON_LLVM_COMPONENTS})
-    unset(LPYTHON_LLVM_COMPONENTS)
+    llvm_map_components_to_libnames(llvm_libs ${LCOMPILERS_LLVM_COMPONENTS})
+    unset(LCOMPILERS_LLVM_COMPONENTS)
 
     add_library(p::llvm INTERFACE IMPORTED)
     set_property(TARGET p::llvm PROPERTY INTERFACE_INCLUDE_DIRECTORIES
@@ -132,7 +132,7 @@ if (WITH_LLVM)
     #set_property(TARGET p::llvm PROPERTY INTERFACE_COMPILE_OPTIONS
     #    ${LLVM_DEFINITIONS})
     set_property(TARGET p::llvm PROPERTY INTERFACE_COMPILE_OPTIONS
-        $<$<COMPILE_LANGUAGE:CXX>:${LPYTHON_CXX_NO_RTTI_FLAG}>)
+        $<$<COMPILE_LANGUAGE:CXX>:${LCOMPILERS_CXX_NO_RTTI_FLAG}>)
     set_property(TARGET p::llvm PROPERTY INTERFACE_LINK_LIBRARIES
         ${llvm_libs})
     if (MSVC)
@@ -251,7 +251,7 @@ else ()
 endif ()
 message("Installation prefix: ${CMAKE_INSTALL_PREFIX}")
 message("WITH_LCOMPILERS_ASSERT: ${WITH_LCOMPILERS_ASSERT}")
-message("LPYTHON_STATIC_BIN: ${LPYTHON_STATIC_BIN}")
+message("LCOMPILERS_STATIC_BIN: ${LCOMPILERS_STATIC_BIN}")
 message("WITH_STACKTRACE: ${WITH_STACKTRACE}")
 message("WITH_UNWIND: ${WITH_UNWIND}")
 message("WITH_BFD: ${WITH_BFD}")
diff --git a/build1.sh b/build1.sh
index b73689fd16..418222435a 100755
--- a/build1.sh
+++ b/build1.sh
@@ -6,7 +6,7 @@ set -x
 cmake \
     -DCMAKE_BUILD_TYPE=Debug \
     -DWITH_LLVM=yes \
-    -DLPYTHON_BUILD_ALL=yes \
+    -DLCOMPILERS_BUILD_ALL=yes \
     -DWITH_STACKTRACE=yes \
     -DWITH_LCOMPILERS_BINARY_MODFILES=no \
     -DCMAKE_PREFIX_PATH="$CMAKE_PREFIX_PATH_LPYTHON;$CONDA_PREFIX" \
diff --git a/src/bin/CMakeLists.txt b/src/bin/CMakeLists.txt
index 7262a66c50..8550a77d5c 100644
--- a/src/bin/CMakeLists.txt
+++ b/src/bin/CMakeLists.txt
@@ -1,7 +1,7 @@
 add_executable(lpython lpython.cpp)
 target_include_directories(lpython PRIVATE "tpl")
 target_link_libraries(lpython lpython_lib)
-if (LPYTHON_STATIC_BIN)
+if (LCOMPILERS_STATIC_BIN)
     if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
         # Link statically on Linux with gcc or clang
         if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR
diff --git a/src/lpython/parser/parser.h b/src/lpython/parser/parser.h
index 3992bdd4cf..0c68e2c064 100644
--- a/src/lpython/parser/parser.h
+++ b/src/lpython/parser/parser.h
@@ -1,5 +1,5 @@
-#ifndef LPYTHON_PARSER_PARSER_H
-#define LPYTHON_PARSER_PARSER_H
+#ifndef LCOMPILERS_PARSER_PARSER_H
+#define LCOMPILERS_PARSER_PARSER_H
 
 #include <libasr/containers.h>
 #include <libasr/diagnostics.h>
diff --git a/src/lpython/parser/parser_exception.h b/src/lpython/parser/parser_exception.h
index 68c2fdfba9..abc30c1f04 100644
--- a/src/lpython/parser/parser_exception.h
+++ b/src/lpython/parser/parser_exception.h
@@ -1,5 +1,5 @@
-#ifndef LPYTHON_PARSER_PARSER_EXCEPTION_H
-#define LPYTHON_PARSER_PARSER_EXCEPTION_H
+#ifndef LCOMPILERS_PARSER_PARSER_EXCEPTION_H
+#define LCOMPILERS_PARSER_PARSER_EXCEPTION_H
 
 #include <libasr/exception.h>
 #include <libasr/diagnostics.h>
@@ -46,4 +46,4 @@ namespace parser_local {
 }
 
 
-#endif // LPYTHON_PARSER_PARSER_EXCEPTION_H
+#endif // LCOMPILERS_PARSER_PARSER_EXCEPTION_H
diff --git a/src/lpython/parser/parser_stype.h b/src/lpython/parser/parser_stype.h
index e4591ed9eb..a491dcd5c3 100644
--- a/src/lpython/parser/parser_stype.h
+++ b/src/lpython/parser/parser_stype.h
@@ -1,5 +1,5 @@
-#ifndef LPYTHON_PARSER_STYPE_H
-#define LPYTHON_PARSER_STYPE_H
+#ifndef LCOMPILERS_PARSER_STYPE_H
+#define LCOMPILERS_PARSER_STYPE_H
 
 #include <cstring>
 #include <lpython/python_ast.h>
@@ -62,4 +62,4 @@ typedef struct LCompilers::Location YYLTYPE;
 #define YYLTYPE_IS_TRIVIAL 0
 
 
-#endif // LPYTHON_PARSER_STYPE_H
+#endif // LCOMPILERS_PARSER_STYPE_H
diff --git a/src/lpython/parser/semantics.h b/src/lpython/parser/semantics.h
index dfa4cd86c0..246856d80b 100644
--- a/src/lpython/parser/semantics.h
+++ b/src/lpython/parser/semantics.h
@@ -1,5 +1,5 @@
-#ifndef LPYTHON_PARSER_SEMANTICS_H
-#define LPYTHON_PARSER_SEMANTICS_H
+#ifndef LCOMPILERS_PARSER_SEMANTICS_H
+#define LCOMPILERS_PARSER_SEMANTICS_H
 
 /*
    This header file contains parser semantics: how the AST classes get
diff --git a/src/lpython/parser/tokenizer.h b/src/lpython/parser/tokenizer.h
index b0ce51fb44..c674132de6 100644
--- a/src/lpython/parser/tokenizer.h
+++ b/src/lpython/parser/tokenizer.h
@@ -1,5 +1,5 @@
-#ifndef LPYTHON_SRC_PARSER_TOKENIZER_H
-#define LPYTHON_SRC_PARSER_TOKENIZER_H
+#ifndef LCOMPILERS_SRC_PARSER_TOKENIZER_H
+#define LCOMPILERS_SRC_PARSER_TOKENIZER_H
 
 #include <libasr/exception.h>
 #include <libasr/alloc.h>
@@ -88,4 +88,4 @@ std::string pickle_token(int token, const YYSTYPE &yystype);
 
 } // namespace LCompilers
 
-#endif // LPYTHON_SRC_PARSER_TOKENIZER_H
+#endif // LCOMPILERS_SRC_PARSER_TOKENIZER_H
diff --git a/src/lpython/semantics/python_attribute_eval.h b/src/lpython/semantics/python_attribute_eval.h
index b3cdf88df7..ddd673d77f 100644
--- a/src/lpython/semantics/python_attribute_eval.h
+++ b/src/lpython/semantics/python_attribute_eval.h
@@ -1,5 +1,5 @@
-#ifndef LPYTHON_ATTRIBUTE_EVAL_H
-#define LPYTHON_ATTRIBUTE_EVAL_H
+#ifndef LCOMPILERS_ATTRIBUTE_EVAL_H
+#define LCOMPILERS_ATTRIBUTE_EVAL_H
 
 
 #include <libasr/asr.h>
@@ -313,4 +313,4 @@ struct AttributeHandler {
 
 } // namespace LCompilers
 
-#endif /* LPYTHON_ATTRIBUTE_EVAL_H */
+#endif /* LCOMPILERS_ATTRIBUTE_EVAL_H */
diff --git a/src/lpython/semantics/python_comptime_eval.h b/src/lpython/semantics/python_comptime_eval.h
index d8fc225905..fc9bacda7f 100644
--- a/src/lpython/semantics/python_comptime_eval.h
+++ b/src/lpython/semantics/python_comptime_eval.h
@@ -1,5 +1,5 @@
-#ifndef LPYTHON_SEMANTICS_COMPTIME_EVAL_H
-#define LPYTHON_SEMANTICS_COMPTIME_EVAL_H
+#ifndef LCOMPILERS_SEMANTICS_COMPTIME_EVAL_H
+#define LCOMPILERS_SEMANTICS_COMPTIME_EVAL_H
 
 #include <complex>
 #include <string>
@@ -842,4 +842,4 @@ struct PythonIntrinsicProcedures {
 
 } // namespace LCompilers
 
-#endif /* LPYTHON_SEMANTICS_COMPTIME_EVAL_H */
+#endif /* LCOMPILERS_SEMANTICS_COMPTIME_EVAL_H */