diff --git a/lib/cfl/CMakeLists.txt b/lib/cfl/CMakeLists.txt
index 2193cb29ce3..e2a5cba373c 100644
--- a/lib/cfl/CMakeLists.txt
+++ b/lib/cfl/CMakeLists.txt
@@ -40,12 +40,8 @@ if(NOT MSVC)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 endif()
 
-# Define __FILENAME__ consistently across Operating Systems
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath $$<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
-endif()
+# Define __FILENAME__
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 
 
diff --git a/lib/cmetrics/CMakeLists.txt b/lib/cmetrics/CMakeLists.txt
index 4f298910674..9c40dadf43a 100644
--- a/lib/cmetrics/CMakeLists.txt
+++ b/lib/cmetrics/CMakeLists.txt
@@ -60,12 +60,8 @@ if(NOT MSVC)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 endif()
 
-# Define __CMT_FILENAME__ consistently across Operating Systems
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__CMT_FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath $$<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__CMT_FILENAME__=__FILE__")
-endif()
+# Define __CMT_FILENAME__
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__CMT_FILENAME__=__FILE__")
 
 # Configuration options
 option(CMT_DEV                       "Enable development mode"                   No)
diff --git a/lib/ctraces/CMakeLists.txt b/lib/ctraces/CMakeLists.txt
index e92834e0611..5cebb3b738e 100644
--- a/lib/ctraces/CMakeLists.txt
+++ b/lib/ctraces/CMakeLists.txt
@@ -30,12 +30,8 @@ set(CTR_VERSION_MINOR  5)
 set(CTR_VERSION_PATCH  6)
 set(CTR_VERSION_STR "${CTR_VERSION_MAJOR}.${CTR_VERSION_MINOR}.${CTR_VERSION_PATCH}")
 
-# Define __FILENAME__ consistently across Operating Systems
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath $$<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
-endif()
+# Define __FILENAME__
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 # Configuration options
 option(CTR_DEV             "Enable development mode"                   No)
diff --git a/lib/monkey/CMakeLists.txt b/lib/monkey/CMakeLists.txt
index 95d8cc1e618..d2fcdf205e8 100644
--- a/lib/monkey/CMakeLists.txt
+++ b/lib/monkey/CMakeLists.txt
@@ -15,10 +15,8 @@ include(GNUInstallDirs)
 # Set default compiler options
 if (NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -Wall -Wextra")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath \$$<))\"'")
-else()
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 endif()
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 # Monkey Version
 set(MK_VERSION_MAJOR  1)