diff --git a/.github/workflows/acceptance.yml b/.github/workflows/acceptance.yml
index 7fbabc4c..3687b2d1 100644
--- a/.github/workflows/acceptance.yml
+++ b/.github/workflows/acceptance.yml
@@ -14,6 +14,7 @@ jobs:
   test:
     if: ${{ github.event_name == 'push' || github.event.label.name == 'run-acceptance-tests' || github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' }}
     name: Acceptance
+    container: heroku/heroku:20-build
     runs-on: ubuntu-latest
     env:
       SLUGCMPLR_ACC: "true"
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4cd8441b..38da3480 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,5 +29,5 @@ jobs:
       - uses: actions/checkout@v3
       - uses: golangci/golangci-lint-action@v3.4.0
         with:
-          version: v1.50
+          version: v1.57
 
diff --git a/buildpack/buildpack.go b/buildpack/buildpack.go
index 0a3ecea3..146d66a3 100644
--- a/buildpack/buildpack.go
+++ b/buildpack/buildpack.go
@@ -119,11 +119,12 @@ func (b *Buildpack) Compile(ctx context.Context, exports []*Buildpack, build *Bu
 func (b *Buildpack) Export(_ context.Context, build *Build) (string, bool, error) {
 	export := filepath.Join(build.BuildDir, BuildpacksDir, b.Directory, "export")
 
-	if _, err := os.Stat(export); err == nil {
-		return export, true, nil
-	} else if os.IsNotExist(err) {
-		return "", false, nil
-	} else {
+	if _, err := os.Stat(export); err != nil {
+		if os.IsNotExist(err) {
+			return "", false, nil
+		}
 		return "", false, err
 	}
+
+	return export, true, nil
 }
diff --git a/cmd/slugcmplr/compile.go b/cmd/slugcmplr/compile.go
index fcb8b990..7751e9a1 100644
--- a/cmd/slugcmplr/compile.go
+++ b/cmd/slugcmplr/compile.go
@@ -68,8 +68,7 @@ func compile(ctx context.Context, out outputter, h *heroku.Service, c *Compile,
 		return fmt.Errorf("error encoding metadata: %w", err)
 	}
 
-	// #nosec G306
-	if err := os.WriteFile(
+	if err := os.WriteFile( // #nosec G306
 		filepath.Join(buildDir, "release.json"),
 		b.Bytes(),
 		0644,
@@ -87,7 +86,7 @@ func compileCmd(verbose bool) *cobra.Command {
 		Use:   "compile",
 		Short: "compile the target applications",
 		Args:  cobra.NoArgs,
-		RunE: func(cmd *cobra.Command, args []string) error {
+		RunE: func(cmd *cobra.Command, _ []string) error {
 			output := outputterFromCmd(cmd, verbose)
 
 			if cacheDir == "" {
diff --git a/cmd/slugcmplr/main_test.go b/cmd/slugcmplr/main_test.go
index 863cdfdd..d9235e97 100644
--- a/cmd/slugcmplr/main_test.go
+++ b/cmd/slugcmplr/main_test.go
@@ -38,7 +38,7 @@ func testPrepare(t *testing.T) {
 	t.Parallel()
 
 	withHarness(t, "CGA1123/slugcmplr-fixture-binary",
-		func(t *testing.T, appName, repoDir string, h *heroku.Service) {
+		func(t *testing.T, appName, _ string, _ *heroku.Service) {
 			buildDir, err := os.MkdirTemp("", "CGA1123__slugmplr-fixture-binary_build_")
 			if err != nil {
 				t.Fatalf("failed to create build directory: %v", err)
@@ -136,7 +136,7 @@ func testDetectFail(t *testing.T) {
 
 	configVars := map[string]string{"FOO": "BAR", "BAR": "FOO"}
 
-	withStubPrepare(t, "CGA1123/slugcmplr-fixture-binary", buildpacks, configVars, func(t *testing.T, app, buildDir string) {
+	withStubPrepare(t, "CGA1123/slugcmplr-fixture-binary", buildpacks, configVars, func(t *testing.T, _, buildDir string) {
 		var compileErr error
 		// Compile
 		logBuilder := &strings.Builder{}
@@ -177,7 +177,7 @@ func testSlugIgnore(t *testing.T) {
 
 	configVars := map[string]string{"FOO": "BAR", "BAR": "FOO"}
 
-	withStubPrepare(t, "CGA1123/slugcmplr-fixture-slugignore", buildpacks, configVars, func(t *testing.T, app, buildDir string) {
+	withStubPrepare(t, "CGA1123/slugcmplr-fixture-slugignore", buildpacks, configVars, func(t *testing.T, _, buildDir string) {
 		foundPaths := []string{}
 		expectedPaths := []string{
 			"/README.md",
@@ -237,7 +237,7 @@ func testRails(t *testing.T) {
 func endToEndSmoke(t *testing.T, fixture string) {
 	t.Helper()
 
-	withHarness(t, fixture, func(t *testing.T, app, src string, h *heroku.Service) {
+	withHarness(t, fixture, func(t *testing.T, app, src string, _ *heroku.Service) {
 		pattn := strings.ReplaceAll(fixture, "/", "__") + "_"
 		buildDir, err := os.MkdirTemp("", pattn)
 		if err != nil {
diff --git a/cmd/slugcmplr/release.go b/cmd/slugcmplr/release.go
index 2fda30bc..84a8949d 100644
--- a/cmd/slugcmplr/release.go
+++ b/cmd/slugcmplr/release.go
@@ -23,7 +23,7 @@ func releaseCmd(verbose bool) *cobra.Command {
 		Use:   "release",
 		Short: "release a slug",
 		Args:  cobra.NoArgs,
-		RunE: func(cmd *cobra.Command, args []string) error {
+		RunE: func(cmd *cobra.Command, _ []string) error {
 			ctx := cmd.Context()
 			out := outputterFromCmd(cmd, verbose)
 			h, err := netrcClient(out)
diff --git a/cmd/slugcmplr/version.go b/cmd/slugcmplr/version.go
index 3afdcea6..80f67d78 100644
--- a/cmd/slugcmplr/version.go
+++ b/cmd/slugcmplr/version.go
@@ -11,7 +11,7 @@ func versionCmd(verbose bool) *cobra.Command {
 		Use:   "version",
 		Short: "version information",
 		Args:  cobra.NoArgs,
-		RunE: func(cmd *cobra.Command, args []string) error {
+		RunE: func(cmd *cobra.Command, _ []string) error {
 			out := outputterFromCmd(cmd, verbose).OutOrStdout()
 
 			fmt.Fprintf(out, "Build Version:   %v\n", version)
diff --git a/processfile/procfile.go b/processfile/procfile.go
index 5a6ceb1f..2d62977a 100644
--- a/processfile/procfile.go
+++ b/processfile/procfile.go
@@ -10,7 +10,7 @@ import (
 // Procfile contains the definition of a Procfile.
 type Procfile map[string]string
 
-var regex = regexp.MustCompile(`^(?P<process>[a-zA-Z0-9]+): (?P<command>.*)$`)
+var regex = regexp.MustCompile(`^(?P<process>[a-zA-Z0-9_-]+): (?P<command>.*)$`)
 
 // New creates a new Procfile in-memory.
 func New() Procfile {
diff --git a/processfile/procfile_test.go b/processfile/procfile_test.go
index bd6ed462..7cefa94f 100644
--- a/processfile/procfile_test.go
+++ b/processfile/procfile_test.go
@@ -86,19 +86,21 @@ func Test_Read(t *testing.T) {
 
 	valid := `web: bin/server
 worker: bundle exec sidekiq -c config/sidekiq.yml
-cron: bin/scheduler`
+cron: bin/scheduler
+my_process: echo "hello"`
 
 	procf, err := processfile.Read(strings.NewReader(valid))
 	if err != nil {
 		t.Fatalf("unexpected error when reading procfile: %v", err)
 	}
 
-	Contain(t, []string{"web", "worker", "cron"}, procf.Processes())
+	Contain(t, []string{"web", "worker", "cron", "my_process"}, procf.Processes())
 
 	expected := map[string]string{
-		"web":    "bin/server",
-		"worker": "bundle exec sidekiq -c config/sidekiq.yml",
-		"cron":   "bin/scheduler",
+		"web":        "bin/server",
+		"worker":     "bundle exec sidekiq -c config/sidekiq.yml",
+		"cron":       "bin/scheduler",
+		"my_process": `echo "hello"`,
 	}
 
 	for proc, cmd := range expected {