diff --git a/EmptyEpsilon-2020.08.07.tar.gz b/EmptyEpsilon-2020.08.07.tar.gz
deleted file mode 100644
index b3a6013..0000000
--- a/EmptyEpsilon-2020.08.07.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0964edf59b12b3b4a2c3c0e2ab659b654b49b3f2d7d5c9aad5dfcf4d51c2082b
-size 270858781
diff --git a/EmptyEpsilon-2021.06.23.tar.gz b/EmptyEpsilon-2021.06.23.tar.gz
new file mode 100644
index 0000000..b37c12c
--- /dev/null
+++ b/EmptyEpsilon-2021.06.23.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:878f36330a95a76039671a980a2fd680e7ddbdc5e22ff6ca046010b03d3efd01
+size 285211647
diff --git a/SeriousProton-2020.08.07.tar.gz b/SeriousProton-2020.08.07.tar.gz
deleted file mode 100644
index d0a8b36..0000000
--- a/SeriousProton-2020.08.07.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9247e61c6c7f01bcdd5b7588d25db6647623038178b7812fb241d0d73c9352d7
-size 1172263
diff --git a/SeriousProton-2021.06.23.tar.gz b/SeriousProton-2021.06.23.tar.gz
new file mode 100644
index 0000000..9cd0453
--- /dev/null
+++ b/SeriousProton-2021.06.23.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4c79b358ad310c773dd0db265393fba829df10a6f284240acbb383288d4f33d5
+size 1181117
diff --git a/download.sh b/download.sh
index d0293a6..320849b 100644
--- a/download.sh
+++ b/download.sh
@@ -1,6 +1,15 @@
 #!/bin/bash
 
-version="$1"
+#version="$1"
+version=$(grep Version: emptyepsilon.spec | awk '{print $NF}')
 
 wget https://github.com/daid/SeriousProton/archive/EE-${version}.tar.gz -O SeriousProton-${version}.tar.gz
 wget https://github.com/daid/EmptyEpsilon/archive/EE-${version}.tar.gz -O EmptyEpsilon-${version}.tar.gz
+
+tmp=$(mktemp -d)
+
+tar xzvf EmptyEpsilon-${version}.tar.gz -C "$tmp" EmptyEpsilon-EE-${version}/CMakeLists.txt
+glm_url=$(grep -A1 glm.zip "${tmp}/EmptyEpsilon-EE-${version}/CMakeLists.txt" | grep "https://" | awk -F '"' '{print $2}')
+wget "$glm_url" -O glm.zip
+
+rm -r "$tmp"
diff --git a/emptyepsilon.changes b/emptyepsilon.changes
index e3653c9..0d9e45a 100644
--- a/emptyepsilon.changes
+++ b/emptyepsilon.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Aug 20 13:03:24 UTC 2021 - Dominik Heidler <dheidler@suse.de>
+
+- Version 2021.06.23
+
 -------------------------------------------------------------------
 Thu Aug 13 15:50:43 UTC 2020 - Dominik Heidler <dheidler@suse.de>
 
diff --git a/emptyepsilon.spec b/emptyepsilon.spec
index 929a6eb..f59a661 100644
--- a/emptyepsilon.spec
+++ b/emptyepsilon.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package emptyepsilon
 #
-# Copyright (c) 2020 SUSE LLC
+# Copyright (c) 2021 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,7 +17,7 @@
 
 
 Name:           emptyepsilon
-Version:        2020.08.07
+Version:        2021.06.23
 Release:        0
 Summary:        Open source spaceship bridge simulator
 License:        GPL-2.0-only
@@ -25,6 +25,9 @@ Group:          Amusements/Games/Other
 URL:            https://daid.github.io/EmptyEpsilon/
 Source:         EmptyEpsilon-%{version}.tar.gz
 Source1:        SeriousProton-%{version}.tar.gz
+Source2:        glm.zip
+Source3:        download.sh
+BuildRequires:  bsdtar
 BuildRequires:  cmake
 BuildRequires:  gcc
 BuildRequires:  gcc-c++
@@ -40,9 +43,10 @@ Each officer fills a unique role: Captain, Helms, Weapons, Relay, Science, and E
 cd $RPM_SOURCE_DIR
 tar xf SeriousProton-%{version}.tar.gz
 tar xf EmptyEpsilon-%{version}.tar.gz
-sed 's|new Engine();|chdir(RESOURCE_BASE_DIR); new Engine();|' -i EmptyEpsilon-EE-%{version}/src/main.cpp
 
 %build
+mkdir externals
+bsdtar xvf $RPM_SOURCE_DIR/glm.zip -C externals
 cmake -DSERIOUS_PROTON_DIR="$RPM_SOURCE_DIR/SeriousProton-EE-%{version}" \
  -DCMAKE_INSTALL_PREFIX=%{_prefix} \
  -DCMAKE_BUILD_TYPE=Release \
@@ -55,13 +59,12 @@ cmake -DSERIOUS_PROTON_DIR="$RPM_SOURCE_DIR/SeriousProton-EE-%{version}" \
 
 %install
 %make_install
-install -Dvm 644 $RPM_SOURCE_DIR/EmptyEpsilon-EE-%{version}/README.md -t "%{buildroot}%{_datadir}/doc/emptyepsilon"
-mv -v "%{buildroot}%{_prefix}/script_reference.html" "%{buildroot}%{_datadir}/doc/emptyepsilon"
+install -Dvm 644 $RPM_SOURCE_DIR/EmptyEpsilon-EE-%{version}/README.md -t "%{buildroot}%{_datadir}/doc/EmptyEpsilon"
 
 %files
 # You may have to add additional files here (documentation and binaries mostly)
 %{_bindir}/EmptyEpsilon
-%{_datadir}/doc/emptyepsilon/
+%{_datadir}/doc/EmptyEpsilon/
 %{_datadir}/emptyepsilon/
 
 %changelog
diff --git a/glm.zip b/glm.zip
new file mode 100644
index 0000000..2fc8a22
--- /dev/null
+++ b/glm.zip
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:37e2a3d62ea3322e43593c34bae29f57e3e251ea89f4067506c94043769ade4c
+size 5670692