diff --git a/build/CMakeLists.txt b/build/CMakeLists.txt
index edde2e06..7f9b8c66 100644
--- a/build/CMakeLists.txt
+++ b/build/CMakeLists.txt
@@ -3,6 +3,9 @@ cmake_minimum_required ( VERSION 2.8.12 )
 cmake_policy( VERSION 2.8.12 )
 project ( "i2pd" )
 
+# for debugging
+#set(CMAKE_VERBOSE_MAKEFILE on)
+
 # configurale options
 option(WITH_AESNI     "Use AES-NI instructions set" OFF)
 option(WITH_HARDENING "Use hardening compiler flags" OFF)
diff --git a/docs/build_notes_unix.md b/docs/build_notes_unix.md
index cdde1ee7..795e408a 100644
--- a/docs/build_notes_unix.md
+++ b/docs/build_notes_unix.md
@@ -16,7 +16,7 @@ Let's clone the repository and start building the i2pd:
 git clone https://github.com/PurpleI2P/i2pd.git
 cd i2pd/build
 cmake -DCMAKE_BUILD_TYPE=Release # more options could be passed, see "CMake Options"
-make
+make                             # you may add VERBOSE=1 to cmdline for debugging
 ```
 
 After successfull build i2pd could be installed with: