Index: build.sh
--- build.sh.orig	2018-09-26 15:39:39.000000000 +0200
+++ build.sh	2018-09-26 19:03:10.343658000 +0200
@@ -40,7 +40,7 @@
 
 CC="${CC:-gcc}"
 LINKER="${LD:-gcc}"
-COMP_FLAGS="${CPPFLAGS:-} ${CFLAGS:-} -w -O3 -fno-strict-aliasing$extraBuildArgs"
+COMP_FLAGS="${CPPFLAGS:-} ${CFLAGS:-} -fno-strict-aliasing$extraBuildArgs"
 LINK_FLAGS="${LDFLAGS:-} "
 PS4=""
 # platform detection
@@ -85,8 +85,6 @@
     ;;
   *freebsd* )
     myos="freebsd"
-    CC="clang"
-    LINKER="clang"
     LINK_FLAGS="$LINK_FLAGS -lm"
     ;;
   *openbsd* )
@@ -99,8 +97,6 @@
     ;;
   *darwin* )
     myos="macosx"
-    CC="clang"
-    LINKER="clang"
     LINK_FLAGS="$LINK_FLAGS -ldl -lm"
     if [ "$HOSTTYPE" = "x86_64" ] ; then
       ucpu="amd64"
Index: install.sh
--- install.sh.orig	2018-09-26 15:39:39.000000000 +0200
+++ install.sh	2018-09-26 18:59:57.091038000 +0200
@@ -61,6 +61,9 @@
       mkdir -p $1/nim
       mkdir -p $bindir
       mkdir -p $configdir
+      mkdir -p $libdir
+      mkdir -p $docdir
+      mkdir -p $datadir
       ;;
   esac