diff --git a/appconfig/appconfig.go b/appconfig/appconfig.go
index 65438c6..126e5b6 100644
--- a/appconfig/appconfig.go
+++ b/appconfig/appconfig.go
@@ -153,15 +153,16 @@ func (c *AppConfig) GetConfigDesc() []string {
 		}
 	}
 
-	filter := "Filter: "
+	var filterBuilder strings.Builder
+	filterBuilder.WriteString("Filter: ")
 	if len(c.Filter) > 0 {
 		for _, f := range c.Filter {
-			filter += fmt.Sprintf("\n  %s", f)
+			filterBuilder.WriteString(fmt.Sprintf("\n  %s", f))
 		}
 	} else {
-		filter += "None"
+		filterBuilder.WriteString("None")
 	}
-	desc = append(desc, filter)
+	desc = append(desc, filterBuilder.String())
 
 	return desc
 }
diff --git a/installer/github_release_installer.go b/installer/github_release_installer.go
index 50f05fd..7446c5a 100644
--- a/installer/github_release_installer.go
+++ b/installer/github_release_installer.go
@@ -61,10 +61,8 @@ func (i *GitHubReleaseInstaller) Validate() []ValidationError {
 	}
 	if opts.DownloadFilename == nil || len(*opts.DownloadFilename.Resolve()) == 0 {
 		errors = append(errors, ValidationError{FieldName: "download_filename", Message: validationIsRequired(), InstallerName: *info.Name})
-	} else {
-		if (*opts.DownloadFilename).Resolve() == nil || len(*(*opts.DownloadFilename).Resolve()) == 0 {
-			errors = append(errors, ValidationError{FieldName: fmt.Sprintf("download_filename.%s", platform.GetPlatform()), Message: validationIsRequired(), InstallerName: *info.Name})
-		}
+	} else if (*opts.DownloadFilename).Resolve() == nil || len(*(*opts.DownloadFilename).Resolve()) == 0 {
+		errors = append(errors, ValidationError{FieldName: fmt.Sprintf("download_filename.%s", platform.GetPlatform()), Message: validationIsRequired(), InstallerName: *info.Name})
 	}
 	if opts.Strategy != nil {
 		if *opts.Strategy != GitHubReleaseInstallStrategyNone && *opts.Strategy != GitHubReleaseInstallStrategyTar && *opts.Strategy != GitHubReleaseInstallStrategyZip {
diff --git a/platform/platform.go b/platform/platform.go
index e86272f..b9c1bdc 100644
--- a/platform/platform.go
+++ b/platform/platform.go
@@ -163,8 +163,8 @@ func ParselatformMap[T any](values map[string]T) *PlatformMap[T] {
 // NewPlatformMap creates a new PlatformMap from either a single value or a map.
 func NewPlatformMap[T any](input any) *PlatformMap[T] {
 	switch v := input.(type) {
-	case T:
-		return ParsePlatformSingleValue(v)
+	case nil:
+		return nil
 	case *T:
 		if v != nil {
 			return ParsePlatformSingleValue(*v)
@@ -180,8 +180,8 @@ func NewPlatformMap[T any](input any) *PlatformMap[T] {
 			}
 		}
 		return ParselatformMap(flat)
-	case nil:
-		return nil
+	case T:
+		return ParsePlatformSingleValue(v)
 	default:
 		panic(fmt.Sprintf("NewPlatformMap: unsupported input type %T", input))
 	}
diff --git a/utils/env.go b/utils/env.go
index 2baed65..8b199d5 100644
--- a/utils/env.go
+++ b/utils/env.go
@@ -2,6 +2,7 @@ package utils
 
 import (
 	"fmt"
+	"maps"
 	"strings"
 )
 
@@ -39,9 +40,7 @@ func CombineEnvMaps(envs ...*map[string]string) map[string]string {
 		if env == nil {
 			continue
 		}
-		for k, v := range *env {
-			out[k] = v
-		}
+		maps.Copy(out, *env)
 	}
 	return out
 }
@@ -77,8 +76,6 @@ func mergeEnvs(source *[]string, target []string) []string {
 	if source == nil {
 		source = &[]string{} // Treat nil source as empty
 	}
-	for k, v := range EnvSliceAsMap(*source) {
-		tgt[k] = v // Override or add keys from source
-	}
+	maps.Copy(tgt, EnvSliceAsMap(*source))
 	return EnvMapAsSlice(tgt)
 }