diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..ff5e64a
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,17 @@
+<constraints>
+  <hardware>
+    <physicalmemory>
+      <size unit="G">4</size>
+    </physicalmemory>
+  </hardware>
+  <overwrite>
+    <conditions>
+      <arch>riscv64</arch>
+    </conditions>
+    <hardware>
+      <physicalmemory>
+        <size unit="G">8</size>
+      </physicalmemory>
+    </hardware>
+  </overwrite>
+</constraints>
diff --git a/alex-3.2.5.tar.gz b/alex-3.2.5.tar.gz
deleted file mode 100644
index 82dcc3c..0000000
--- a/alex-3.2.5.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b77c8a1270767c64e2adb21a6e91ee7cd904ba17edae17bc20fd03da5256e0e3
-size 108531
diff --git a/ghc-bootstrap-helpers.changes b/ghc-bootstrap-helpers.changes
index 071580e..cf2d938 100644
--- a/ghc-bootstrap-helpers.changes
+++ b/ghc-bootstrap-helpers.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Jun  2 08:11:28 UTC 2020 - Ondřej Súkup <mimi.vx@gmail.com>
+
+- add constraints for memory on riscv64 
+
 -------------------------------------------------------------------
 Sat Jan 18 09:08:42 UTC 2020 - Peter Trommler <ptrommler@icloud.com>
 
diff --git a/ghc-bootstrap-helpers.spec b/ghc-bootstrap-helpers.spec
index c7ed55a..9979e22 100644
--- a/ghc-bootstrap-helpers.spec
+++ b/ghc-bootstrap-helpers.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package ghc-bootstrap-helpers
 #
-# Copyright (c) 2020 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -22,12 +22,8 @@ Release:        0
 Summary:        Dependencies to build ghc
 License:        BSD-3-Clause AND BSD-2-Clause
 URL:            https://build.opensuse.org/project/show/devel:languages:haskell
-Source:         alex-3.2.5.tar.gz
-Source1:        happy-1.19.12.tar.gz
-BuildRequires:  ghc-bootstrap
-# This package is not meant to be used outside OBS
-Requires:       this-is-only-for-build-envs
-
+Source:         helpers.tar.gz
+ExclusiveArch:  x86_64
 Conflicts:      alex
 Conflicts:      happy
 
@@ -35,37 +31,24 @@ Conflicts:      happy
 Prebuild alex and happy for ghc-8.8+ build
 
 Don't use outside GHC-8.8+ build
-% ' Help EMACS syntax highlighting
 
 %prep
-%setup -q -c -a0 -a1
+%setup -q
 
 %build
-pushd alex-3.2.5
-/opt/bin/ghc Setup.hs -o cabal
-./cabal configure --prefix=%{_prefix}
-./cabal build
-popd
-
-pushd happy-1.19.12
-/opt/bin/ghc Setup.hs -o cabal
-./cabal configure --prefix=%{_prefix}
-./cabal build
-popd
 
 %install
-pushd alex-3.2.5
-./cabal copy --destdir=%{buildroot}
-popd
-
-pushd happy-1.19.12
-./cabal copy --destdir=%{buildroot}
-popd
+cp -R * %{buildroot}/
+rm -Rf %{buildroot}%{_datadir}/doc/*
+rm -Rf %{buildroot}/usr/share/man/
+rm -Rf %{buildroot}/usr/share/licenses/
 
 %files
 %{_bindir}/alex
 %{_bindir}/happy
-%{_datadir}/*ghc*
-%{_datadir}/doc/*ghc*
+%dir %{_datadir}/happy-1.19.12/
+%dir %{_datadir}/alex-3.2.5/
+%{_datadir}/alex-3.2.5/*
+%{_datadir}/happy-1.19.12/*
 
 %changelog
diff --git a/happy-1.19.12.tar.gz b/happy-1.19.12.tar.gz
deleted file mode 100644
index 3ec8655..0000000
--- a/happy-1.19.12.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:fb9a23e41401711a3b288f93cf0a66db9f97da1ce32ec4fffea4b78a0daeb40f
-size 183254