diff --git a/scripts.d/25-gmp.sh b/scripts.d/25-gmp.sh
index 422d267..564adbf 100755
--- a/scripts.d/25-gmp.sh
+++ b/scripts.d/25-gmp.sh
@@ -1,21 +1,21 @@
 #!/bin/bash
 
-GMP_SRC="https://ftp.gnu.org/gnu/gmp/gmp-6.2.1.tar.xz"
+SCRIPT_REPO="https://gmplib.org/repo/gmp/"
+SCRIPT_HGREV="cc75cab76738"
 
 ffbuild_enabled() {
     return 0
 }
 
 ffbuild_dockerbuild() {
-    wget "$GMP_SRC" -O gmp.tar.xz
-    tar xaf gmp.tar.xz
-    rm gmp.tar.xz
-    cd gmp*
+    hg clone -r "$SCRIPT_HGREV" -u "$SCRIPT_HGREV" "$SCRIPT_REPO" gmp
+    cd gmp
 
-    autoreconf -i
+    ./.bootstrap
 
     local myconf=(
         --prefix="$FFBUILD_PREFIX"
+        --enable-maintainer-mode
         --disable-shared
         --enable-static
         --with-pic