Only in iwlib-0.1.2-patched: dist
diff -ubr iwlib-0.1.2/iwlib.cabal iwlib-0.1.2-patched/iwlib.cabal
--- iwlib-0.1.2/iwlib.cabal	2001-09-09 01:46:40.000000000 +0000
+++ iwlib-0.1.2-patched/iwlib.cabal	2024-11-21 11:50:52.468886653 +0000
@@ -24,5 +24,5 @@
   includes:            iwlib.h
   default-language:    Haskell2010
   exposed-modules:     Network.IWlib
-  extra-libraries:     iw
+  extra-libraries:     iw m
   ghc-options:         -Wall
\ No newline at end of file