diff --git a/hammer.py b/hammer.py
index 83dcac1df3..db514bf015 100755
--- a/hammer.py
+++ b/hammer.py
@@ -63,8 +63,8 @@ SYSTEMS = {
         '35': False,
         '36': False,
         '37': False,
-        '38': True,
-        '39': True,
+        '38': False,
+        '39': False,
         '40': True,
         '41': True,
     },
@@ -82,7 +82,7 @@ SYSTEMS = {
     },
     'ubuntu': {
         '16.04': False,
-        '18.04': True,
+        '18.04': False,
         '18.10': False,
         '19.04': False,
         '19.10': False,
@@ -95,7 +95,7 @@ SYSTEMS = {
     'debian': {
         '8': False,
         '9': False,
-        '10': True,
+        '10': False,
         '11': True,
         '12': True,
     },
@@ -104,7 +104,7 @@ SYSTEMS = {
         '11.4': False,
         '12.0': False,
         '12.1': False,
-        '13.0': True,
+        '13.0': False,
         '14.0': True,
     },
     'alpine': {
@@ -114,8 +114,8 @@ SYSTEMS = {
         '3.13': False,
         '3.14': False,
         '3.15': False,
-        '3.16': True,
-        '3.17': True,
+        '3.16': False,
+        '3.17': False,
         '3.18': True,
         '3.19': True,
         '3.20': True,