diff --git a/tools/make-chromium.sh b/tools/make-chromium.sh
index cd901f3eb..afdb25d74 100755
--- a/tools/make-chromium.sh
+++ b/tools/make-chromium.sh
@@ -23,7 +23,7 @@ cp platform/chromium/*.json $DES/
 cp -R $DES/_locales/nb $DES/_locales/no
 
 echo "*** uBlock0.chromium: Generating meta..."
-python tools/make-chromium-meta.py $DES/
+python3 tools/make-chromium-meta.py $DES/
 
 if [ "$1" = all ]; then
     echo "*** uBlock0.chromium: Creating plain package..."
diff --git a/tools/make-opera.sh b/tools/make-opera.sh
index 75e3c2b49..2c0ee4997 100755
--- a/tools/make-opera.sh
+++ b/tools/make-opera.sh
@@ -44,6 +44,6 @@ rm $DES/lib/publicsuffixlist/wasm/*.wasm
 rm $DES/lib/publicsuffixlist/wasm/*.wat
 
 echo "*** uBlock0.opera: Generating meta..."
-python tools/make-opera-meta.py $DES/
+python3 tools/make-opera-meta.py $DES/
 
 echo "*** uBlock0.opera: Package done."
diff --git a/tools/make-thunderbird.sh b/tools/make-thunderbird.sh
index 07096a160..ad07c8ff4 100755
--- a/tools/make-thunderbird.sh
+++ b/tools/make-thunderbird.sh
@@ -27,7 +27,7 @@ cp -R $DES/_locales/nb             $DES/_locales/no
 rm $DES/img/icon_128.png
 
 echo "*** uBlock0.thunderbird: Generating meta..."
-python tools/make-firefox-meta.py $DES/
+python3 tools/make-firefox-meta.py $DES/
 
 if [ "$1" = all ]; then
     echo "*** uBlock0.thunderbird: Creating package..."