diff --git a/merlin/merlin.py b/merlin/merlin.py
index b75d743..fe07596 100755
--- a/merlin/merlin.py
+++ b/merlin/merlin.py
@@ -336,11 +336,12 @@ repos = {
         'interval': twice_daily,
         'max-sync-time': maxtime,
     },
-    'qtproject': {
-        'command': '~/bin/csc-sync-standard qtproject master.qt.io qt-all',
-        'interval': twice_daily,
-        'max-sync-time': maxtime,
-    },
+    # We stopped mirroring qtproject on 2021-12-22 due to disk performance issues.
+    #'qtproject': {
+    #    'command': '~/bin/csc-sync-standard qtproject master.qt.io qt-all',
+    #    'interval': twice_daily,
+    #    'max-sync-time': maxtime,
+    #},
     'tdf': {
         'command': '~/bin/csc-sync-standard tdf rsync.documentfoundation.org tdf-pub',
         'interval': twice_daily,
diff --git a/mirror-index/config.yaml b/mirror-index/config.yaml
index 47acc36..d112356 100644
--- a/mirror-index/config.yaml
+++ b/mirror-index/config.yaml
@@ -190,10 +190,6 @@ directories:
     site: puppylinux.org
     url: https://puppylinux.org/
 
-  qtproject:
-    site: qt-project.org
-    url: https://qt-project.org/
-
   racket:
     site: racket-lang.org
     url: https://racket-lang.org/