diff --git a/resources/resource_transformers/postcss/postcss.go b/resources/resource_transformers/postcss/postcss.go
index adf2b5164..eab52b8c5 100644
--- a/resources/resource_transformers/postcss/postcss.go
+++ b/resources/resource_transformers/postcss/postcss.go
@@ -60,7 +60,7 @@ func New(rs *resources.Spec) *Client {
 	return &Client{rs: rs}
 }
 
-func DecodeOptions(m map[string]any) (opts Options, err error) {
+func decodeOptions(m map[string]any) (opts Options, err error) {
 	if m == nil {
 		return
 	}
@@ -82,8 +82,8 @@ type Client struct {
 }
 
 // Process transforms the given Resource with the PostCSS processor.
-func (c *Client) Process(res resources.ResourceTransformer, options Options) (resource.Resource, error) {
-	return res.Transform(&postcssTransformation{rs: c.rs, options: options})
+func (c *Client) Process(res resources.ResourceTransformer, options map[string]any) (resource.Resource, error) {
+	return res.Transform(&postcssTransformation{rs: c.rs, optionsm: options})
 }
 
 // Some of the options from https://github.com/postcss/postcss-cli
@@ -137,12 +137,12 @@ func (opts Options) toArgs() []string {
 }
 
 type postcssTransformation struct {
-	options Options
-	rs      *resources.Spec
+	optionsm map[string]any
+	rs       *resources.Spec
 }
 
 func (t *postcssTransformation) Key() internal.ResourceTransformationKey {
-	return internal.NewResourceTransformationKey("postcss", t.options)
+	return internal.NewResourceTransformationKey("postcss", t.optionsm)
 }
 
 // Transform shells out to postcss-cli to do the heavy lifting.
@@ -157,8 +157,17 @@ func (t *postcssTransformation) Transform(ctx *resources.ResourceTransformationC
 	var configFile string
 	logger := t.rs.Logger
 
-	if t.options.Config != "" {
-		configFile = t.options.Config
+	var options Options
+	if t.optionsm != nil {
+		var err error
+		options, err = decodeOptions(t.optionsm)
+		if err != nil {
+			return err
+		}
+	}
+
+	if options.Config != "" {
+		configFile = options.Config
 	} else {
 		configFile = "postcss.config.js"
 	}
@@ -168,9 +177,9 @@ func (t *postcssTransformation) Transform(ctx *resources.ResourceTransformationC
 	// We need an absolute filename to the config file.
 	if !filepath.IsAbs(configFile) {
 		configFile = t.rs.BaseFs.ResolveJSConfigFile(configFile)
-		if configFile == "" && t.options.Config != "" {
+		if configFile == "" && options.Config != "" {
 			// Only fail if the user specified config file is not found.
-			return fmt.Errorf("postcss config %q not found:", t.options.Config)
+			return fmt.Errorf("postcss config %q not found:", options.Config)
 		}
 	}
 
@@ -181,7 +190,7 @@ func (t *postcssTransformation) Transform(ctx *resources.ResourceTransformationC
 		cmdArgs = []any{"--config", configFile}
 	}
 
-	if optArgs := t.options.toArgs(); len(optArgs) > 0 {
+	if optArgs := options.toArgs(); len(optArgs) > 0 {
 		cmdArgs = append(cmdArgs, collections.StringSliceToInterfaceSlice(optArgs)...)
 	}
 
@@ -212,11 +221,11 @@ func (t *postcssTransformation) Transform(ctx *resources.ResourceTransformationC
 	imp := newImportResolver(
 		ctx.From,
 		ctx.InPath,
-		t.options,
+		options,
 		t.rs.Assets.Fs, t.rs.Logger,
 	)
 
-	if t.options.InlineImports {
+	if options.InlineImports {
 		var err error
 		src, err = imp.resolve()
 		if err != nil {
diff --git a/resources/resource_transformers/postcss/postcss_test.go b/resources/resource_transformers/postcss/postcss_test.go
index f5d49300a..6901d69de 100644
--- a/resources/resource_transformers/postcss/postcss_test.go
+++ b/resources/resource_transformers/postcss/postcss_test.go
@@ -31,14 +31,14 @@ import (
 // Issue 6166
 func TestDecodeOptions(t *testing.T) {
 	c := qt.New(t)
-	opts1, err := DecodeOptions(map[string]any{
+	opts1, err := decodeOptions(map[string]any{
 		"no-map": true,
 	})
 
 	c.Assert(err, qt.IsNil)
 	c.Assert(opts1.NoMap, qt.Equals, true)
 
-	opts2, err := DecodeOptions(map[string]any{
+	opts2, err := decodeOptions(map[string]any{
 		"noMap": true,
 	})
 
diff --git a/tpl/resources/resources.go b/tpl/resources/resources.go
index 165152c78..428e36c92 100644
--- a/tpl/resources/resources.go
+++ b/tpl/resources/resources.go
@@ -405,15 +405,8 @@ func (ns *Namespace) PostCSS(args ...any) (resource.Resource, error) {
 	if err != nil {
 		return nil, err
 	}
-	var options postcss.Options
-	if m != nil {
-		options, err = postcss.DecodeOptions(m)
-		if err != nil {
-			return nil, err
-		}
-	}
 
-	return ns.postcssClient.Process(r, options)
+	return ns.postcssClient.Process(r, m)
 }
 
 func (ns *Namespace) PostProcess(r resource.Resource) (postpub.PostPublishedResource, error) {