diff --git a/developer/src/kmc/src/commands/analyze.ts b/developer/src/kmc/src/commands/analyze.ts
index fd6314ec86..3c53609179 100644
--- a/developer/src/kmc/src/commands/analyze.ts
+++ b/developer/src/kmc/src/commands/analyze.ts
@@ -36,7 +36,7 @@ function declareOskCharUse(command: Command) {
     .option('--include-counts', 'Include number of times each character is referenced', false)
     .option('--strip-dotted-circle', 'Strip U+25CC (dotted circle base) from results', false)
     .addOption(new Option('-m, --mapping-file <filename>', 'Result file to write to (.json, .md, or .txt)').makeOptionMandatory())
-    .action(async (filenames: string[], _options: any, commander: any) => {
+    .action(async (filenames: string[], _options: any, commander: any): Promise<never|void> => {
       const options = commander.optsWithGlobals();
       if(!filenames.length) {
         // If there are no filenames provided, then we are building the current
@@ -46,7 +46,7 @@ function declareOskCharUse(command: Command) {
 
       if(!await analyze(analyzeOskCharUse, filenames, options)) {
         // Once a file fails to build, we bail on subsequent builds
-        await exitProcess(1);
+        return await exitProcess(1);
       }
     });
 
@@ -66,8 +66,10 @@ function declareOskRewrite(command: Command) {
 
       if(!await analyze(analyzeOskRewritePua, filenames, options)) {
         // Once a file fails to build, we bail on subsequent builds
-        await exitProcess(1);
+        return await exitProcess(1);
       }
+
+      return null;
     });
 }
 
diff --git a/developer/src/kmc/src/commands/build.ts b/developer/src/kmc/src/commands/build.ts
index edbba0e207..9669997055 100644
--- a/developer/src/kmc/src/commands/build.ts
+++ b/developer/src/kmc/src/commands/build.ts
@@ -77,11 +77,11 @@ function initialize(commanderOptions: any) {
   return options;
 }
 
-async function buildFile(filenames: string[], _options: any, commander: any)  {
+async function buildFile(filenames: string[], _options: any, commander: any): Promise<never|void> {
   const commanderOptions/*:{TODO?} CommandLineCompilerOptions*/ = commander.optsWithGlobals();
   const options = initialize(commanderOptions);
   if(!options) {
-    await exitProcess(1);
+    return await exitProcess(1);
   }
 
   const callbacks = new NodeCompilerCallbacks(options);
@@ -97,17 +97,17 @@ async function buildFile(filenames: string[], _options: any, commander: any)  {
   if(filenames.length > 1 && commanderOptions.outFile) {
     // -o can only be specified with a single input file
     callbacks.reportMessage(InfrastructureMessages.Error_OutFileCanOnlyBeSpecifiedWithSingleInfile());
-    await exitProcess(1);
+    return await exitProcess(1);
   }
 
   if(!expandFileLists(filenames, callbacks)) {
-    await exitProcess(1);
+    return await exitProcess(1);
   }
 
   for(let filename of filenames) {
     if(!await build(filename, commanderOptions.outFile, callbacks, options)) {
       // Once a file fails to build, we bail on subsequent builds
-      await exitProcess(1);
+      return await exitProcess(1);
     }
   }
 }
diff --git a/developer/src/kmc/src/commands/buildWindowsPackageInstaller/index.ts b/developer/src/kmc/src/commands/buildWindowsPackageInstaller/index.ts
index 32a06b47ee..591dfe2e02 100644
--- a/developer/src/kmc/src/commands/buildWindowsPackageInstaller/index.ts
+++ b/developer/src/kmc/src/commands/buildWindowsPackageInstaller/index.ts
@@ -16,7 +16,7 @@ interface WindowsPackageInstallerCommandLineOptions extends CommandLineBaseOptio
   startWithConfiguration: boolean;
 };
 
-export async function buildWindowsPackageInstaller(infile: string, _options: any, commander: any) {
+export async function buildWindowsPackageInstaller(infile: string, _options: any, commander: any): Promise<never|void> {
   // TODO(lowpri): we probably should cleanup the options management here, move
   // translation of command line options to kmc-* options into a separate module
   const options: WindowsPackageInstallerCommandLineOptions = commander.optsWithGlobals();
@@ -39,7 +39,7 @@ export async function buildWindowsPackageInstaller(infile: string, _options: any
   const callbacks: CompilerCallbacks = new NodeCompilerCallbacks({...defaultCompilerOptions, ...options});
   const compiler = new WindowsPackageInstallerCompiler();
   if(!await compiler.init(callbacks, {...options, sources})) {
-    await exitProcess(1);
+    return await exitProcess(1);
   }
 
   const fileBaseName = outfile ?? infile;
@@ -50,10 +50,10 @@ export async function buildWindowsPackageInstaller(infile: string, _options: any
   const result = await compiler.run(infile, outFileExe);
   if(!result) {
     // errors will have been reported already
-    await exitProcess(1);
+    return await exitProcess(1);
   }
 
   if(!await compiler.write(result.artifacts)) {
-    await exitProcess(1);
+    return await exitProcess(1);
   }
 }