--- a/chessx.pro	2024-09-06 00:12:14.000000000 +0200
+++ b/chessx.pro	2025-01-03 21:51:05.872265212 +0100
@@ -41,7 +41,6 @@
   QT += multimedia
 }
 
-DEFINES += QUAZIP_STATIC
 DEFINES += QT_NO_CAST_TO_ASCII
 DEFINES *= QT_USE_QSTRINGBUILDER
 
@@ -342,23 +341,7 @@
   src/gui/textbrowserex.h \
   src/gui/textedit.h \
   src/gui/toolmainwindow.h \
-  src/gui/translatingslider.h \
-  src/quazip/JlCompress.h \
-  src/quazip/crypt.h \
-  src/quazip/ioapi.h \
-  src/quazip/quaadler32.h \
-  src/quazip/quachecksum32.h \
-  src/quazip/quacrc32.h \
-  src/quazip/quagzipfile.h \
-  src/quazip/quaziodevice.h \
-  src/quazip/quazip.h \
-  src/quazip/quazip_global.h \
-  src/quazip/quazipdir.h \
-  src/quazip/quazipfile.h \
-  src/quazip/quazipfileinfo.h \
-  src/quazip/quazipnewinfo.h \
-  src/quazip/unzip.h \
-  src/quazip/zip.h
+  src/gui/translatingslider.h
 
 SOURCES += \
   src/database/analysis.cpp \
@@ -512,26 +495,15 @@
   src/gui/testadapter.cpp \
   src/gui/textedit.cpp \
   src/gui/toolmainwindow.cpp \
-  src/gui/translatingslider.cpp \
-  src/quazip/JlCompress.cpp \
-  src/quazip/qioapi.cpp \
-  src/quazip/quaadler32.cpp \
-  src/quazip/quacrc32.cpp \
-  src/quazip/quagzipfile.cpp \
-  src/quazip/quaziodevice.cpp \
-  src/quazip/quazip.cpp \
-  src/quazip/quazipdir.cpp \
-  src/quazip/quazipfile.cpp \
-  src/quazip/quazipnewinfo.cpp \
-  src/quazip/unzip.cpp \
-  src/quazip/zip.cpp
+  src/gui/translatingslider.cpp
 
 INCLUDEPATH += src/database
 INCLUDEPATH += src/guess
 INCLUDEPATH += src/gui
 INCLUDEPATH += src/dialogs
-INCLUDEPATH += src/quazip
-INCLUDEPATH += $$[QT_INSTALL_PREFIX]/src/3rdparty/zlib
+
+CONFIG += link_pkgconfig
+PKGCONFIG += quazip1-qt6
 
 win32 {
   # DEFINES += ZLIB_WINAPI