diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index 1a1f6fd..5b12076 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -22,35 +22,35 @@
 #add_subdirectory(apps_data)
 
 SET(PYTHONPATH
-	${CMAKE_SOURCE_DIR}/python
-	${CMAKE_SOURCE_DIR}/python/misc_utils
-	${CMAKE_SOURCE_DIR}/python/demapping
-	${CMAKE_SOURCE_DIR}/python/receiver
-	${CMAKE_SOURCE_DIR}/python/transmitter
-	${CMAKE_SOURCE_DIR}/python/trx
-	${CMAKE_BINARY_DIR}/swig
-	$ENV{PYTHONPATH}
-	)
+    ${CMAKE_SOURCE_DIR}/python
+    ${CMAKE_SOURCE_DIR}/python/misc_utils
+    ${CMAKE_SOURCE_DIR}/python/demapping
+    ${CMAKE_SOURCE_DIR}/python/receiver
+    ${CMAKE_SOURCE_DIR}/python/transmitter
+    ${CMAKE_SOURCE_DIR}/python/trx
+    ${CMAKE_BINARY_DIR}/swig
+    $ENV{PYTHONPATH}
+    )
 string(REPLACE ";" ":" PYTHONPATH "${PYTHONPATH}")
 
 ADD_CUSTOM_COMMAND(
-	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon
-	COMMAND "${CMAKE_COMMAND}"
-		-E env PYTHONPATH="${PYTHONPATH}" GRC_BLOCKS_PATH=${CMAKE_SOURCE_DIR}/grc
-		${PC_GNURADIO_RUNTIME_PREFIX}/${GR_RUNTIME_DIR}/grcc -d ${CMAKE_CURRENT_BINARY_DIR}
-		${CMAKE_CURRENT_SOURCE_DIR}/grgsm_livemon.grc
-	COMMAND "${CMAKE_COMMAND}" -E rename grgsm_livemon.py grgsm_livemon
-	DEPENDS grgsm_livemon.grc
-	)
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon
+    COMMAND "${CMAKE_COMMAND}"
+        -E env PYTHONPATH="${PYTHONPATH}" GRC_BLOCKS_PATH=${CMAKE_SOURCE_DIR}/grc
+        ${PC_GNURADIO_RUNTIME_PREFIX}/${GR_RUNTIME_DIR}/grcc -d ${CMAKE_CURRENT_BINARY_DIR}
+        ${CMAKE_CURRENT_SOURCE_DIR}/grgsm_livemon.grc
+    COMMAND "${CMAKE_COMMAND}" -E rename grgsm_livemon.py grgsm_livemon
+    DEPENDS grgsm_livemon.grc
+)
 ADD_CUSTOM_COMMAND(
-	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon_headless
-	COMMAND "${CMAKE_COMMAND}"
-		-E env PYTHONPATH="${PYTHONPATH}" GRC_BLOCKS_PATH=${CMAKE_SOURCE_DIR}/grc
-		${PC_GNURADIO_RUNTIME_PREFIX}/${GR_RUNTIME_DIR}/grcc -d ${CMAKE_CURRENT_BINARY_DIR}
-		${CMAKE_CURRENT_SOURCE_DIR}/grgsm_livemon_headless.grc
-	COMMAND "${CMAKE_COMMAND}" -E rename grgsm_livemon_headless.py grgsm_livemon_headless
-	DEPENDS grgsm_livemon_headless.grc
-	)
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon_headless
+    COMMAND "${CMAKE_COMMAND}"
+        -E env PYTHONPATH="${PYTHONPATH}" GRC_BLOCKS_PATH=${CMAKE_SOURCE_DIR}/grc
+        ${PC_GNURADIO_RUNTIME_PREFIX}/${GR_RUNTIME_DIR}/grcc -d ${CMAKE_CURRENT_BINARY_DIR}
+        ${CMAKE_CURRENT_SOURCE_DIR}/grgsm_livemon_headless.grc
+    COMMAND "${CMAKE_COMMAND}" -E rename grgsm_livemon_headless.py grgsm_livemon_headless
+    DEPENDS grgsm_livemon_headless.grc
+)
 
 ########################################################################
 # Override the GR_UNIQUE_TARGET function to not append a hash
@@ -75,8 +75,8 @@
 
 GR_PYTHON_INSTALL(
     PROGRAMS
-	${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon
-	${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon_headless
+    ${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon
+    ${CMAKE_CURRENT_BINARY_DIR}/grgsm_livemon_headless
     grgsm_scanner
     grgsm_decode
     grgsm_trx