diff --git a/common/environment/setup/sourcepkg.sh b/common/environment/setup/sourcepkg.sh
index e0e16d7915cb90..3a9bcdacb872f2 100644
--- a/common/environment/setup/sourcepkg.sh
+++ b/common/environment/setup/sourcepkg.sh
@@ -18,6 +18,7 @@ unset -v reverts subpackages makedepends hostmakedepends checkdepends depends re
 unset -v nopie build_options build_options_default bootstrap repository reverts
 unset -v CFLAGS CXXFLAGS FFLAGS CPPFLAGS LDFLAGS LD_LIBRARY_PATH
 unset -v CC CXX CPP GCC LD AR AS RANLIB NM OBJDUMP OBJCOPY STRIP READELF PKG_CONFIG
+unset -v CMAKE_GENERATOR
 
 # hooks/do-extract/00-distfiles
 unset -v skip_extraction