diff --git a/gmic.spec b/gmic.spec
index a7de12c..873b12a 100644
--- a/gmic.spec
+++ b/gmic.spec
@@ -1,16 +1,15 @@
-%global gimpplugindir %(%___build_pre; gimptool --gimpplugindir)/plug-ins/gmic_gimp_qt
+%global gimpplugindir %(%___build_pre; gimptool --gimpplugindir)/plug-ins
 
 %global use_system_cimg 1
 
 # As generated by new-snapshot.sh script
 %global zart_version 20231127gitd014169
 %global gmic_qt_version 20250520gitb55b8ca
-%global gmic_community_version 20250608git8bbd3d4a
-
+%global gmic_community_version 20251227git7e21d80b
 
 Summary: GREYC's Magic for Image Computing
 Name:    gmic
-Version: 3.5.5
+Version: 3.6.6
 %global shortver %(foo=%{version}; echo ${foo//./})
 Release: %autorelease
 Source0: https://gmic.eu/files/source/%{name}_%{version}.tar.gz
@@ -157,9 +156,7 @@ iconv -f iso8859-1 -t utf-8 COPYING > COPYING.conv && mv -f COPYING.conv COPYING
 iconv -f iso8859-1 -t utf-8 COPYING-libcgmic > COPYING-libcgmic.conv && mv -f COPYING-libcgmic.conv COPYING-libcgmic
 
 cd src
-# Makefile hardcodes gimptool-2.0 for setting PLUGIN var, so
-# override for gimp-3 compat until upstream fixes its rules
-make DESTDIR=$RPM_BUILD_ROOT PREFIX=%{_prefix} LIB=%{_lib} PLUGIN=%{gimpplugindir} install
+make DESTDIR=$RPM_BUILD_ROOT PREFIX=%{_prefix} LIB=%{_lib} install
 
 desktop-file-validate $RPM_BUILD_ROOT/%{_datadir}/applications/gmic_qt.desktop
 desktop-file-validate $RPM_BUILD_ROOT/%{_datadir}/applications/zart.desktop
@@ -193,16 +190,36 @@ fi
 # cpio can't handle file -> dir replacements, so must manually
 # purge the old file path.
 #
+# Then also handle upgrades from a botched update to 3.5.5 which
+# created an extra sub-directory level.
+#
+# cpio can't handle dir -> file replacements, so must manually
+# purge the old directory path.
+#
 # Workaround could be removed in Fedora >= 45 timeframe at which
 # point we shouldn't see any legacy files around in a normal
 # upgrade scenario.
 %pretrans -p <lua> gimp
-path = "%{gimpplugindir}"
+path = "%{gimpplugindir}/gmic_gimp_qt"
 st = posix.stat(path)
 if st and st.type == "regular" then
   os.remove(path)
 end
 
+path = "%{gimpplugindir}/gmic_gimp_qt/gmic_gimp_qt"
+st = posix.stat(path)
+if st and st.type == "directory" then
+  status = os.rename(path, path .. ".rpmmoved")
+  if not status then
+    suffix = 0
+    while not status do
+      suffix = suffix + 1
+      status = os.rename(path .. ".rpmmoved", path .. ".rpmmoved." .. suffix)
+    end
+    os.rename(path, path .. ".rpmmoved")
+  end
+end
+
 %posttrans
 /usr/bin/gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 
@@ -231,6 +248,9 @@ end
 %files gimp
 %dir %{gimpplugindir}
 %{gimpplugindir}/gmic_gimp_qt
+# Remove ghosts in Fedora >= 45, see pretrans script
+%ghost %{gimpplugindir}/gmic_gimp_qt/gmic_gimp_qt.rpmmoved
+%ghost %{gimpplugindir}/gmic_gimp_qt/gmic_gimp_qt.rpmmoved/gmic_gimp_qt
 %dir %{_datadir}/gmic
 %{_datadir}/gmic/gmic_cluts.gmz
 %{_datadir}/gmic/gmic_denoise_cnn.gmz
diff --git a/sources b/sources
index cb15fd3..bae85e9 100644
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
-SHA512 (gmic-community-20250608git8bbd3d4a.tar.gz) = 0494f8e7af13150767e705fc611956d6715e2aa5409d41ac253effa68955b673edf700b896d11ddcd1ca8787555ddc3e0cc2b6ee99d27ef33c41410ee9bc25fe
-SHA512 (gmic-qt-20250520gitb55b8ca.tar.gz) = 31c6d2e0d407bad32a7e8eabe1c09d03766e9703af447f1986dab113a958c5472ae128f974f0346a26c02bcd6f3e13a08a5ef4d918d71466237339ed44a74f71
 SHA512 (zart-20231127gitd014169.tar.gz) = a9b9497e764e785811b7fca66f305207842bf71f9cfbebfd474cf325b067d3145875ad530a5ac3d6f130284d509949cb10ff7c9004b3820f2fbc60a3873fb225
-SHA512 (gmic_3.5.5.tar.gz) = df7e436e8f6c5849f31c6c039b7cd26b2565a9feb16b855f6f0246b3e0c5214179b1bda36d70d9853b7d5184f94c962039d2e9256099703776278d8c5030f649
+SHA512 (gmic_3.6.6.tar.gz) = 500cc5f860b9e4791858f36785913871677ce125e0359693ffaaee68234ce2808ff94b1153f131042795c8888366a280430ad2647769b03c9ac2ae803b540ff9
+SHA512 (gmic-community-20251227git7e21d80b.tar.gz) = 8f472a79b609b1e6562587df77126f5fe0a2837960a34df16fe2376a7b20ac208fa094720d8c539cb23d04b1039b20b1bf3c546312fcc0cb2e666624c7adaeb6
+SHA512 (gmic-qt-20250520gitb55b8ca.tar.gz) = 31c6d2e0d407bad32a7e8eabe1c09d03766e9703af447f1986dab113a958c5472ae128f974f0346a26c02bcd6f3e13a08a5ef4d918d71466237339ed44a74f71