diff --git a/configs/sites/tier1/hera/packages.yaml b/configs/sites/tier1/hera/packages.yaml
index c7808255a..cac0aa394 100644
--- a/configs/sites/tier1/hera/packages.yaml
+++ b/configs/sites/tier1/hera/packages.yaml
@@ -128,6 +128,7 @@ packages:
     - spec: pkg-config@0.27.1
       prefix: /usr
   qt:
+    buildable: False
     externals:
     - spec: qt@5.12.6
       prefix: /contrib/spack-stack/installs/qt-5.12.6/qtbase
diff --git a/configs/sites/tier1/hercules/packages.yaml b/configs/sites/tier1/hercules/packages.yaml
index 823efda8e..d7d36fa79 100644
--- a/configs/sites/tier1/hercules/packages.yaml
+++ b/configs/sites/tier1/hercules/packages.yaml
@@ -84,6 +84,7 @@ packages:
     - spec: pkgconf@1.7.3
       prefix: /usr
   qt:
+    buildable: False
     externals:
     - spec: qt@5.15.14
       prefix: /apps/contrib/spack-stack-1.1/gcc-11.3.1/qt-5.15.14-mfeuvcidmyqoi2m5i2tfrk6yd7xtk6pt
diff --git a/configs/sites/tier1/orion/packages.yaml b/configs/sites/tier1/orion/packages.yaml
index f588f1b78..97dbd20c2 100644
--- a/configs/sites/tier1/orion/packages.yaml
+++ b/configs/sites/tier1/orion/packages.yaml
@@ -94,6 +94,7 @@ packages:
     - spec: pkgconf@1.7.3
       prefix: /usr
   qt:
+    buildable: False
     externals:
     - spec: qt@5.15.14
       prefix: /apps/spack-managed-x86_64_v3-v1.0/gcc-11.3.1/qt-5.15.14-xsxk4vxuyi4apu36ix6heamra673izdu