1 files changed, 7 insertions, 0 deletions
diff --git a/pkgs/lib/strings.nix b/pkgs/lib/strings.nix
index 19d1738182f4..4d8999278875 100644
--- a/pkgs/lib/strings.nix
+++ b/pkgs/lib/strings.nix
@@ -109,6 +109,13 @@ rec {
       stringAsChars subst s;
 
 
+  # Case conversion utilities
+  lowerChars = stringToCharacters "abcdefghijklmnopqrstuvwxyz";
+  upperChars = stringToCharacters "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+  toLower = replaceChars upperChars lowerChars;
+  toUpper = replaceChars lowerChars upperChars;
+
+
   # Compares strings not requiring context equality
   # Obviously, a workaround but works on all Nix versions
   eqStrings = a: b: (a+(substring 0 0 b)) == ((substring 0 0 a)+b);