diff --git a/mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/SDKProcessor.java b/mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/SDKProcessor.java
index f1ece6357c5a..6e2fbdd7f6ab 100644
--- a/mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/SDKProcessor.java
+++ b/mobile/android/annotations/src/main/java/org/mozilla/gecko/annotationProcessors/SDKProcessor.java
@@ -233,7 +233,7 @@ public class SDKProcessor {
 
         System.out.println("Processing platform bindings...");
 
-        final String sdkJar = args[0];
+        final File sdkJar = new File(args[0]);
         sMaxSdkVersion = Integer.parseInt(args[1]);
         final String outdir = args[2];
 
@@ -276,7 +276,7 @@ public class SDKProcessor {
             // Used to track the calls to the various class-specific initialisation functions.
             ClassLoader loader = null;
             try {
-                loader = URLClassLoader.newInstance(new URL[]{new URL("file://" + sdkJar)},
+                loader = URLClassLoader.newInstance(new URL[]{sdkJar.toURI().toURL()},
                         SDKProcessor.class.getClassLoader());
             } catch (Exception e) {
                 throw new RuntimeException(e.toString());
diff --git a/mobile/android/geckoview/build.gradle b/mobile/android/geckoview/build.gradle
index 21cf56fb4d9f..d0a69b93967f 100644
--- a/mobile/android/geckoview/build.gradle
+++ b/mobile/android/geckoview/build.gradle
@@ -494,7 +494,7 @@ task("generateSDKBindings", type: JavaExec) {
         // From -Pgenerate_sdk_bindings_args=... on command line; missing in
         // `android-gradle-dependencies` toolchain task.
         if (project.hasProperty('generate_sdk_bindings_args')) {
-            args project.generate_sdk_bindings_args.split(':')
+            args project.generate_sdk_bindings_args.split(';')
         }
     }
 
diff --git a/mobile/android/mach_commands.py b/mobile/android/mach_commands.py
index 48805c4a4bc8..928d486ed68f 100755
--- a/mobile/android/mach_commands.py
+++ b/mobile/android/mach_commands.py
@@ -80,7 +80,7 @@ class MachCommands(MachCommandBase):
             return os.path.basename(input).rsplit('-classes.txt', 1)[0]
 
         bindings_inputs = list(itertools.chain(*((input, stem(input)) for input in inputs)))
-        bindings_args = '-Pgenerate_sdk_bindings_args={}'.format(':'.join(bindings_inputs))
+        bindings_args = '-Pgenerate_sdk_bindings_args={}'.format(';'.join(bindings_inputs))
 
         ret = self.gradle(
             self.substs['GRADLE_ANDROID_GENERATE_SDK_BINDINGS_TASKS'] + [bindings_args] + args,