diff --git a/tools/binman/etype/gbb.py b/tools/binman/etype/gbb.py
index 41554eb..ca8af1b 100644
--- a/tools/binman/etype/gbb.py
+++ b/tools/binman/etype/gbb.py
@@ -77,20 +77,27 @@
         bmpfv_size = gbb_size - 0x2180
         if bmpfv_size < 0:
             self.Raise('GBB is too small (minimum 0x2180 bytes)')
-        sizes = [0x100, 0x1000, bmpfv_size, 0x1000]
-        sizes = ['%#x' % size for size in sizes]
         keydir = tools.GetInputFilename(self.keydir)
-        gbb_set_command = [
-            'gbb_utility', '-s',
-            '--hwid=%s' % self.hardware_id,
-            '--rootkey=%s/root_key.vbpubk' % keydir,
-            '--recoverykey=%s/recovery_key.vbpubk' % keydir,
-            '--flags=%d' % self.gbb_flags,
-            '--bmpfv=%s' % tools.GetInputFilename(self.bmpblk),
-            fname]
 
-        tools.Run('futility', 'gbb_utility', '-c', ','.join(sizes), fname)
-        tools.Run('futility', *gbb_set_command)
+        stdout = self.futility.gbb_create(
+            fname, [0x100, 0x1000, bmpfv_size, 0x1000])
+        if stdout is not None:
+            stdout = self.futility.gbb_set(
+                fname,
+                hwid=self.hardware_id,
+                rootkey='%s/root_key.vbpubk' % keydir,
+                recoverykey='%s/recovery_key.vbpubk' % keydir,
+                flags=self.gbb_flags,
+                bmpfv=tools.GetInputFilename(self.bmpblk))
 
-        self.SetContents(tools.ReadFile(fname))
+        if stdout is not None:
+            self.SetContents(tools.ReadFile(fname))
+        else:
+            # Bintool is missing; just use the required amount of zero data
+            self.record_missing_bintool(self.futility)
+            self.SetContents(tools.GetBytes(0, gbb_size))
+
         return True
+
+    def AddBintools(self, tools):
+        self.futility = self.AddBintool(tools, 'futility')
diff --git a/tools/binman/etype/vblock.py b/tools/binman/etype/vblock.py
index c0a6a28..8bbba27 100644
--- a/tools/binman/etype/vblock.py
+++ b/tools/binman/etype/vblock.py
@@ -38,6 +38,7 @@
     """
     def __init__(self, section, etype, node):
         super().__init__(section, etype, node)
+        self.futility = None
         (self.keydir, self.keyblock, self.signprivate, self.version,
          self.kernelkey, self.preamble_flags) = self.GetEntryArgsOrProps([
             EntryArg('keydir', str),
@@ -68,19 +69,21 @@
         input_fname = tools.GetOutputFilename('input.%s' % uniq)
         tools.WriteFile(input_fname, input_data)
         prefix = self.keydir + '/'
-        args = [
-            'vbutil_firmware',
-            '--vblock', output_fname,
-            '--keyblock', prefix + self.keyblock,
-            '--signprivate', prefix + self.signprivate,
-            '--version', '%d' % self.version,
-            '--fv', input_fname,
-            '--kernelkey', prefix + self.kernelkey,
-            '--flags', '%d' % self.preamble_flags,
-        ]
-        #out.Notice("Sign '%s' into %s" % (', '.join(self.value), self.label))
-        stdout = tools.Run('futility', *args)
-        return tools.ReadFile(output_fname)
+        stdout = self.futility.sign_firmware(
+            vblock=output_fname,
+            keyblock=prefix + self.keyblock,
+            signprivate=prefix + self.signprivate,
+            version=f'{self.version,}',
+            firmware=input_fname,
+            kernelkey=prefix + self.kernelkey,
+            flags=f'{self.preamble_flags}')
+        if stdout is not None:
+            data = tools.ReadFile(output_fname)
+        else:
+            # Bintool is missing; just use 4KB of zero data
+            self.record_missing_bintool(self.futility)
+            data = tools.GetBytes(0, 4096)
+        return data
 
     def ObtainContents(self):
         data = self.GetVblock(False)
@@ -93,3 +96,6 @@
         # The blob may have changed due to WriteSymbols()
         data = self.GetVblock(True)
         return self.ProcessContentsUpdate(data)
+
+    def AddBintools(self, tools):
+        self.futility = self.AddBintool(tools, 'futility')