diff --git a/AboutThisBuild.txt.in b/AboutThisBuild.txt.in
index 065b6c6cc..7c42f244e 100644
--- a/AboutThisBuild.txt.in
+++ b/AboutThisBuild.txt.in
@@ -6,9 +6,9 @@ Compiler: ${COMPILER_INFO}
 Processor: ${PROC_LABEL}
 System: ${SYSTEM}
 Bit depth: ${PROC_BIT_DEPTH}
-Gtkmm: V${GTKMM_VERSION}
-Lensfun: V${LENSFUN_VERSION}
-libjxl: V${JXL_VERSION}
+Gtkmm: ${GTKMM_VERSION}
+Lensfun: ${LENSFUN_VERSION}
+libjxl: ${JXL_VERSION}
 Build type: ${BUILD_TYPE}
 Build flags: ${CXX_FLAGS}
 Link flags: ${LFLAGS}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b6c053dd0..18b4ef04f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -569,11 +569,14 @@ if(JXL_FOUND)
         list(APPEND JXL_LIBRARIES ${JXLTHREADS_LIBRARIES})
     else()
         message(STATUS "  JXL support disabled by WITH_JXL = ${WITH_JXL}")
+        set(JXL_VERSION "Disabled")
         set(JXL_INCLUDE_DIRS "")
         set(JXL_LIBRARIES "")
         set(JXLTHREADS_INCLUDE_DIRS "")
         set(JXLTHREADS_LIBRARIES "")
     endif()
+else()
+    set(JXL_VERSION "Not installed")
 endif()
 
 # Check for libcanberra-gtk3 (sound events on Linux):