Merge pull request #5499 from jchia/bz2

Reinstate bz2

build-constraints.yaml

@@ -353,7 +353,7 @@ packages:
         - sexpr-parser < 0 # via base-4.13.0.0
 
     "Vanessa McHale <vmchale@gmail.com> @vmchale":
-        - bz2 < 1.0.0.2  # https://github.com/commercialhaskell/stackage/issues/5149
+        - bz2
 
     "Henning Thielemann <stackage@henning-thielemann.de> @thielema":
         - accelerate-arithmetic < 0 # GHC 8.4 via accelerate
@@ -4891,6 +4891,9 @@ package-flags:
     brick:
         demos: true
 
+    bz2:
+        with-bzlib: false   # Exclude bzlib from benchmarks to avoid unnecessary dependencies.
+
     mersenne-random-pure64:
         small_base: false