--- ImageLounge/xgd-data/CMakeLists.txt.orig	2020-07-17 10:05:29.000000000 +0300

+++ ImageLounge/xgd-data/CMakeLists.txt	2020-07-23 14:53:16.095891902 +0300

@@ -3,11 +3,12 @@

 	org.nomacs.ImageLounge.appdata.xml)

 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/org.nomacs.ImageLounge.appdata.xml

-	DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/metainfo)

+	DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/metainfo

+	RENAME nomacs.appdata.xml)

 install(FILES org.nomacs.ImageLounge.desktop

-	DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/applications)

+	DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/applications

+	RENAME nomacs.desktop)

 install(FILES ../nomacs.svg

-	DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor/scalable/apps

-	RENAME org.nomacs.ImageLounge.svg)

\ В конце файла нет новой строки

+	DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor/scalable/apps)

--- ImageLounge/xgd-data/org.nomacs.ImageLounge.desktop.orig	2020-07-17 10:05:29.000000000 +0300

+++ ImageLounge/xgd-data/org.nomacs.ImageLounge.desktop	2020-07-23 14:53:16.096891913 +0300

@@ -4,7 +4,7 @@

 Comment=nomacs is a free, open source image viewer.

 Exec=nomacs %F

 Terminal=false

-Icon=org.nomacs.ImageLounge

+Icon=nomacs

 Type=Application

 Categories=Graphics;RasterGraphics;Viewer;2DGraphics;

 MimeType=image/gif;image/jpeg;image/png;image/bmp;image/tiff;image/x-eps;image/x-ico;image/x-portable-bitmap;image/x-portable-graymap;image/x-portable-pixmap;image/x-xbitmap;image/x-xpixmap;