diff --git a/CMakeLists.txt b/CMakeLists.txt
index 436609c..5b460da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,8 +51,12 @@ endif()
 # Define the library
 add_library(tgfs SHARED ${LIB_SOURCES})
 # list code gen dependencies
-add_dependencies(tgfs TGF_B_src)
-add_dependencies(tgfs TGF_C_src)
+if(TARGET TGF_B_src)
+    add_dependencies(tgfs TGF_B_src)
+endif()
+if(TARGET TGF_C_src)
+    add_dependencies(tgfs TGF_C_src)
+endif()
 
 target_compile_options(tgfs PRIVATE -Wno-shift-count-overflow)
 target_include_directories(tgfs PUBLIC incl)
diff --git a/src/sysc/core_complex.cpp b/src/sysc/core_complex.cpp
index 297fdbf..4e06961 100644
--- a/src/sysc/core_complex.cpp
+++ b/src/sysc/core_complex.cpp
@@ -277,8 +277,10 @@ vm_ptr create_cpu(core_wrapper* cpu, std::string const& backend, unsigned gdb_po
     if(backend == "llvm")
         return vm_ptr{iss::llvm::create(lcpu, gdb_port)};
 #endif
+#ifdef WITH_TCC
     if(backend == "tcc")
         return vm_ptr{iss::tcc::create<core_type>(cpu, gdb_port)};
+#endif
     return {nullptr};
 }