diff --git a/scripts/001-binutils.sh b/scripts/001-binutils.sh
index a6b4b54..379078a 100755
--- a/scripts/001-binutils.sh
+++ b/scripts/001-binutils.sh
@@ -36,15 +36,15 @@ TARGET_ALIAS="ee"
 TARG_XTRA_OPTS=""
 OSVER=$(uname)
 
-## If using MacOS Apple, set gmp and mpfr paths using TARG_XTRA_OPTS 
+## If using MacOS Apple, set gmp and mpfr paths using TARG_XTRA_OPTS
 ## (this is needed for Apple Silicon but we will do it for all MacOS systems)
 if [ "$(uname -s)" = "Darwin" ]; then
   ## Check if using brew
   if command -v brew &> /dev/null; then
-    TARG_XTRA_OPTS="--with-gmp=$(brew --prefix gmp) --with-mpfr=$(brew --prefix mpfr)"
+    TARG_XTRA_OPTS="--with-system-zlib --with-gmp=$(brew --prefix gmp) --with-mpfr=$(brew --prefix mpfr)"
   elif command -v port &> /dev/null; then
-  ## Check if using MacPorts
-    TARG_XTRA_OPTS="--with-gmp=$(port -q prefix gmp) --with-mpfr=$(port -q prefix mpfr)"
+    ## Check if using MacPorts
+    TARG_XTRA_OPTS="--with-system-zlib --with-gmp=$(port -q prefix gmp) --with-mpfr=$(port -q prefix mpfr)"
   fi
 fi
 
diff --git a/scripts/002-gcc-stage1.sh b/scripts/002-gcc-stage1.sh
index 1ac5b85..46289fd 100755
--- a/scripts/002-gcc-stage1.sh
+++ b/scripts/002-gcc-stage1.sh
@@ -37,17 +37,17 @@ TARG_XTRA_OPTS=""
 TARGET_CFLAGS="-O2 -gdwarf-2 -gz"
 OSVER=$(uname)
 
-## If using MacOS Apple, set gmp, mpfr and mpc paths using TARG_XTRA_OPTS 
+## If using MacOS Apple, set gmp, mpfr and mpc paths using TARG_XTRA_OPTS
 ## (this is needed for Apple Silicon but we will do it for all MacOS systems)
 if [ "$(uname -s)" = "Darwin" ]; then
   ## Check if using brew
   if command -v brew &> /dev/null; then
-    TARG_XTRA_OPTS="--with-gmp=$(brew --prefix gmp) --with-mpfr=$(brew --prefix mpfr) --with-mpc=$(brew --prefix libmpc)"
+    TARG_XTRA_OPTS="--with-system-zlib --with-gmp=$(brew --prefix gmp) --with-mpfr=$(brew --prefix mpfr) --with-mpc=$(brew --prefix libmpc)"
   elif command -v port &> /dev/null; then
   ## Check if using MacPorts
     MACPORT_BASE=$(dirname `port -q contents gmp|grep gmp.h`|sed s#/include##g)
     echo Macport base is $MACPORT_BASE
-    TARG_XTRA_OPTS="--with-gmp=$MACPORT_BASE --with-mpfr=$MACPORT_BASE --with-mpc=$MACPORT_BASE"
+    TARG_XTRA_OPTS="--with-system-zlib --with-gmp=$MACPORT_BASE --with-mpfr=$MACPORT_BASE --with-mpc=$MACPORT_BASE"
   fi
 fi
 
diff --git a/scripts/006-gcc-stage2.sh b/scripts/006-gcc-stage2.sh
index 3950e26..7335708 100755
--- a/scripts/006-gcc-stage2.sh
+++ b/scripts/006-gcc-stage2.sh
@@ -37,17 +37,17 @@ TARG_XTRA_OPTS=""
 TARGET_CFLAGS="-O2 -gdwarf-2 -gz"
 OSVER=$(uname)
 
-## If using MacOS Apple, set gmp, mpfr and mpc paths using TARG_XTRA_OPTS 
+## If using MacOS Apple, set gmp, mpfr and mpc paths using TARG_XTRA_OPTS
 ## (this is needed for Apple Silicon but we will do it for all MacOS systems)
 if [ "$(uname -s)" = "Darwin" ]; then
   ## Check if using brew
   if command -v brew &> /dev/null; then
-    TARG_XTRA_OPTS="--with-gmp=$(brew --prefix gmp) --with-mpfr=$(brew --prefix mpfr) --with-mpc=$(brew --prefix libmpc)"
+    TARG_XTRA_OPTS="--with-system-zlib --with-gmp=$(brew --prefix gmp) --with-mpfr=$(brew --prefix mpfr) --with-mpc=$(brew --prefix libmpc)"
   elif command -v port &> /dev/null; then
   ## Check if using MacPorts
     MACPORT_BASE=$(dirname `port -q contents gmp|grep gmp.h`|sed s#/include##g)
     echo Macport base is $MACPORT_BASE
-    TARG_XTRA_OPTS="--with-gmp=$MACPORT_BASE --with-mpfr=$MACPORT_BASE --with-mpc=$MACPORT_BASE"
+    TARG_XTRA_OPTS="--with-system-zlib --with-gmp=$MACPORT_BASE --with-mpfr=$MACPORT_BASE --with-mpc=$MACPORT_BASE"
   fi
 fi