--- a/src/CMakeLists.txt	Sat Feb 20 20:32:56 2021 +0100
+++ b/src/CMakeLists.txt	Sun Feb 21 22:11:49 2021 +0100
@@ -17,7 +17,7 @@
 
 # Relpipe libraries:
 INCLUDE(FindPkgConfig)
-pkg_check_modules (RELPIPE_LIBS relpipe-lib-writer.cpp relpipe-lib-cli.cpp libxml++-2.6)
+pkg_check_modules (RELPIPE_LIBS relpipe-lib-writer.cpp relpipe-lib-cli.cpp libxml++-2.6 gumbo)
 include_directories(${RELPIPE_LIBS_INCLUDE_DIRS})
 link_directories(${RELPIPE_LIBS_LIBRARY_DIRS})