diff --git a/map65/CMakeLists.txt b/map65/CMakeLists.txt
index 3f0064939..2eba82efb 100644
--- a/map65/CMakeLists.txt
+++ b/map65/CMakeLists.txt
@@ -51,18 +51,20 @@ add_executable (map65 ${map65_CXXSRCS} ${map65_CSRCS} ${map65_GENUISRCS} map65.r
 target_include_directories (map65 PRIVATE ${CMAKE_SOURCE_DIR} ${FFTW3_INCLUDE_DIRS})
 target_link_libraries (map65 wsjt_qt m65impl ${FFTW3_LIBRARIES} Qt5::Widgets Qt5::Network Portaudio::Portaudio Usb::Usb)
 
-install (
-  CODE "get_filename_component (_path \"\$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/wsjtx_dir.txt\" REALPATH)
+if (WIN32)
+  install (
+    CODE "get_filename_component (_path \"\$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/wsjtx_dir.txt\" REALPATH)
   if (WIN32)
     set (_separator \"\\\\\")
   else ()
     set (_separator \"/\")
   endif ()
   file (WRITE \"\${_path}\" \".\${_separator}\\n\")"
-  )
+    )
 
-install (
-  TARGETS map65
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT runtime
-  BUNDLE DESTINATION . COMPONENT runtime
-  )
+  install (
+    TARGETS map65
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT runtime
+    BUNDLE DESTINATION . COMPONENT runtime
+    )
+endif ()
\ No newline at end of file
diff --git a/map65/libm65/CMakeLists.txt b/map65/libm65/CMakeLists.txt
index 286259949..eff6dd9a8 100644
--- a/map65/libm65/CMakeLists.txt
+++ b/map65/libm65/CMakeLists.txt
@@ -138,8 +138,10 @@ target_link_libraries (mapsim m65impl ${FFTW3_LIBRARIES})
 add_executable (synctest synctest.f90)
 target_link_libraries (synctest m65impl ${FFTW3_LIBRARIES})
 
-install (
-  TARGETS m65 mapsim
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT runtime
-  BUNDLE DESTINATION . COMPONENT runtime
-  )
+if (WIN32)
+  install (
+    TARGETS m65 mapsim
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT runtime
+    BUNDLE DESTINATION . COMPONENT runtime
+    )
+endif ()