diff --git a/builder/config.go b/builder/config.go
index 38c140c..adb7204 100644
--- a/builder/config.go
+++ b/builder/config.go
@@ -21,6 +21,7 @@ import (
 	"io"
 	"os"
 	"path/filepath"
+	"slices"
 
 	"github.com/BurntSushi/toml"
 )
@@ -58,8 +59,8 @@ func NewConfig() (*Config, error) {
 	}
 
 	// Reverse because /etc takes precedence in stateless
-	for i := len(ConfigPaths) - 1; i >= 0; i-- {
-		globPat := filepath.Join(ConfigPaths[i], fmt.Sprintf("*%s", ConfigSuffix))
+	for _, path := range slices.Backward(ConfigPaths) {
+		globPat := filepath.Join(path, fmt.Sprintf("*%s", ConfigSuffix))
 
 		configs, _ := filepath.Glob(globPat)
 
diff --git a/builder/main.go b/builder/main.go
index 057c880..fb60d5c 100644
--- a/builder/main.go
+++ b/builder/main.go
@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"slices"
 )
 
 // DisableColors controls whether or not to use colours in the display.
@@ -54,9 +55,11 @@ const (
 	// CacheDirectory is where packages' build cache are stored.
 	CacheDirectory = "/var/lib/solbuild/cache"
 
-	// Obsolete cache directories. These are only still specified so that the
-	// `delete-cache -a` subcommand will remove them. In the future they will
-	// be removed.
+	/* Obsolete cache directories. These are only still specified so that the
+	* `delete-cache -a` subcommand will remove them. In the future they will
+	* be removed.
+	 */
+
 	ObsoleteCcacheDirectory        = "/var/lib/solbuild/ccache/ypkg"
 	ObsoleteLegacyCcacheDirectory  = "/var/lib/solbuild/ccache/legacy"
 	ObsoleteSccacheDirectory       = "/var/lib/solbuild/sccache/ypkg"
@@ -100,13 +103,7 @@ func PathExists(path string) bool {
 
 // IsValidImage will check if the specified profile is a valid one.
 func IsValidImage(profile string) bool {
-	for _, p := range ValidImages {
-		if p == profile {
-			return true
-		}
-	}
-
-	return false
+	return slices.Contains(ValidImages, profile)
 }
 
 // EmitImageError emits the stock response to requesting an invalid image.
diff --git a/builder/util.go b/builder/util.go
index f0a130c..9e13a6b 100644
--- a/builder/util.go
+++ b/builder/util.go
@@ -378,10 +378,8 @@ func ValidMemSize(s string) bool {
 	lastChar := s[len(s)-1:]
 	validLastChars := []string{"G", "T", "P", "E"}
 
-	for _, v := range validLastChars {
-		if v == lastChar {
-			return true
-		}
+	if slices.Contains(validLastChars, lastChar) {
+		return true
 	}
 
 	slog.Error(fmt.Sprintf("Invalid Memory Size: %s doesn't end in a valid memory unit, e.g. G\n", s))