diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d3f067c..2afcdad 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -305,6 +305,7 @@ jobs:
           submodules: recursive
       - name: Set up cache
         uses: actions/cache@v2
+        id: mpb-cache
         with:
           path: |
             ~/mod-workdir
@@ -312,23 +313,24 @@ jobs:
       - name: Set up dependencies
         run: |
           sudo apt-get update -qq
-          sudo apt-get install -yqq acl bc curl cvs git mercurial rsync subversion wget bison bzip2 flex gawk gperf gzip help2man nano perl patch tar texinfo unzip automake binutils build-essential cpio libtool libncurses-dev pkg-config python libtool-bin
+          sudo apt-get install -yqq acl bc curl cvs git mercurial rsync subversion wget bison bzip2 flex gawk gperf gzip help2man nano perl patch tar texinfo unzip automake binutils build-essential cpio libtool libncurses-dev pkg-config python libtool-bin liblo-dev
       - name: Bootstrap toolchain
+        if: steps.mpb-cache.outputs.cache-hit != 'true'
         run: |
           git clone --depth=1 https://github.com/moddevices/mod-plugin-builder.git deps/mod-plugin-builder
           sed -i "s/CT_LOG_PROGRESS_BAR=y/CT_LOG_PROGRESS_BAR=n/" deps/mod-plugin-builder/toolchain/*.config
           $(pwd)/deps/mod-plugin-builder/bootstrap.sh modduo-static minimal && $(pwd)/deps/mod-plugin-builder/.clean-install.sh modduo-static
-      #- name: Build for modduo
-        #run: |
-          #CFLAGS="-ffat-lto-objects" CXXFLAGS="-ffat-lto-objects" make modduo HAVE_LIBLO=true HEADLESS=true WITH_LTO=true -j $(nproc)
-      #- name: Pack binaries
-        #run: |
-          #tar -c -h --hard-dereference -z -f ${{ github.event.repository.name }}-modduo-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}.tar.gz -C bin $(ls bin | grep lv2)
-      #- uses: actions/upload-artifact@v2
-        #with:
-          #name: ${{ github.event.repository.name }}-modduo-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
-          #path: |
-            #*.tar.gz
+      - name: Build for modduo
+        run: |
+          make modduo HEADLESS=true WITH_LTO=true -j $(nproc)
+      - name: Pack binaries
+        run: |
+          tar -c -h --hard-dereference -z -f ${{ github.event.repository.name }}-modduo-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}.tar.gz -C bin $(ls bin | grep lv2)
+      - uses: actions/upload-artifact@v2
+        with:
+          name: ${{ github.event.repository.name }}-modduo-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
+          path: |
+            *.tar.gz
 
   modduox:
     runs-on: ubuntu-20.04
@@ -338,6 +340,7 @@ jobs:
           submodules: recursive
       - name: Set up cache
         uses: actions/cache@v2
+        id: mpb-cache
         with:
           path: |
             ~/mod-workdir
@@ -345,23 +348,24 @@ jobs:
       - name: Set up dependencies
         run: |
           sudo apt-get update -qq
-          sudo apt-get install -yqq acl bc curl cvs git mercurial rsync subversion wget bison bzip2 flex gawk gperf gzip help2man nano perl patch tar texinfo unzip automake binutils build-essential cpio libtool libncurses-dev pkg-config python libtool-bin
+          sudo apt-get install -yqq acl bc curl cvs git mercurial rsync subversion wget bison bzip2 flex gawk gperf gzip help2man nano perl patch tar texinfo unzip automake binutils build-essential cpio libtool libncurses-dev pkg-config python libtool-bin liblo-dev
       - name: Bootstrap toolchain
+        if: steps.mpb-cache.outputs.cache-hit != 'true'
         run: |
           git clone --depth=1 https://github.com/moddevices/mod-plugin-builder.git deps/mod-plugin-builder
           sed -i "s/CT_LOG_PROGRESS_BAR=y/CT_LOG_PROGRESS_BAR=n/" deps/mod-plugin-builder/toolchain/*.config
           $(pwd)/deps/mod-plugin-builder/bootstrap.sh modduox-static minimal && $(pwd)/deps/mod-plugin-builder/.clean-install.sh modduox-static
-      #- name: Build for modduox
-        #run: |
-          #CFLAGS="-ffat-lto-objects" CXXFLAGS="-ffat-lto-objects" make modduox HAVE_LIBLO=true HEADLESS=true WITH_LTO=true -j $(nproc)
-      #- name: Pack binaries
-        #run: |
-          #tar -c -h --hard-dereference -z -f ${{ github.event.repository.name }}-modduox-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}.tar.gz -C bin $(ls bin | grep lv2)
-      #- uses: actions/upload-artifact@v2
-        #with:
-          #name: ${{ github.event.repository.name }}-modduox-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
-          #path: |
-            #*.tar.gz
+      - name: Build for modduox
+        run: |
+          make modduox HEADLESS=true WITH_LTO=true -j $(nproc)
+      - name: Pack binaries
+        run: |
+          tar -c -h --hard-dereference -z -f ${{ github.event.repository.name }}-modduox-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}.tar.gz -C bin $(ls bin | grep lv2)
+      - uses: actions/upload-artifact@v2
+        with:
+          name: ${{ github.event.repository.name }}-modduox-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
+          path: |
+            *.tar.gz
 
   moddwarf:
     runs-on: ubuntu-20.04
@@ -371,6 +375,7 @@ jobs:
           submodules: recursive
       - name: Set up cache
         uses: actions/cache@v2
+        id: mpb-cache
         with:
           path: |
             ~/mod-workdir
@@ -378,23 +383,24 @@ jobs:
       - name: Set up dependencies
         run: |
           sudo apt-get update -qq
-          sudo apt-get install -yqq acl bc curl cvs git mercurial rsync subversion wget bison bzip2 flex gawk gperf gzip help2man nano perl patch tar texinfo unzip automake binutils build-essential cpio libtool libncurses-dev pkg-config python libtool-bin
+          sudo apt-get install -yqq acl bc curl cvs git mercurial rsync subversion wget bison bzip2 flex gawk gperf gzip help2man nano perl patch tar texinfo unzip automake binutils build-essential cpio libtool libncurses-dev pkg-config python libtool-bin liblo-dev
       - name: Bootstrap toolchain
+        if: steps.mpb-cache.outputs.cache-hit != 'true'
         run: |
           git clone --depth=1 https://github.com/moddevices/mod-plugin-builder.git deps/mod-plugin-builder
           sed -i "s/CT_LOG_PROGRESS_BAR=y/CT_LOG_PROGRESS_BAR=n/" deps/mod-plugin-builder/toolchain/*.config
           $(pwd)/deps/mod-plugin-builder/bootstrap.sh moddwarf minimal && $(pwd)/deps/mod-plugin-builder/.clean-install.sh moddwarf
-      #- name: Build for moddwarf
-        #run: |
-          #CFLAGS="-ffat-lto-objects" CXXFLAGS="-ffat-lto-objects" make moddwarf HAVE_LIBLO=true HEADLESS=true WITH_LTO=true -j $(nproc)
-      #- name: Pack binaries
-        #run: |
-          #tar -c -h --hard-dereference -z -f ${{ github.event.repository.name }}-moddwarf-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}.tar.gz -C bin $(ls bin | grep lv2)
-      #- uses: actions/upload-artifact@v2
-        #with:
-          #name: ${{ github.event.repository.name }}-moddwarf-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
-          #path: |
-            #*.tar.gz
+      - name: Build for moddwarf
+        run: |
+          make moddwarf HEADLESS=true WITH_LTO=true -j $(nproc)
+      - name: Pack binaries
+        run: |
+          tar -c -h --hard-dereference -z -f ${{ github.event.repository.name }}-moddwarf-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}.tar.gz -C bin $(ls bin | grep lv2)
+      - uses: actions/upload-artifact@v2
+        with:
+          name: ${{ github.event.repository.name }}-moddwarf-${{ github.event.pull_request.number || steps.slug.outputs.sha8 }}
+          path: |
+            *.tar.gz
 
   win32:
     runs-on: ubuntu-20.04
diff --git a/Makefile b/Makefile
index 5448197..3c2bf41 100644
--- a/Makefile
+++ b/Makefile
@@ -97,7 +97,7 @@ endif
 # MOD builds
 
 MOD_WORKDIR ?= $(HOME)/mod-workdir
-MOD_ENVIRONMENT = AR=${1}/host/usr/bin/${2}-gcc-ar CC=${1}/host/usr/bin/${2}-gcc CPP=${1}/host/usr/bin/${2}-cpp CXX=${1}/host/usr/bin/${2}-g++ LD=${1}/host/usr/bin/${2}-ld PKG_CONFIG=${1}/host/usr/bin/pkg-config STRIP=${1}/host/usr/bin/${2}-strip CFLAGS="-I${1}/staging/usr/include" CPPFLAGS= CXXFLAGS="-I${1}/staging/usr/include" LDFLAGS="-L${1}/staging/usr/lib" \ EXE_WRAPPER="qemu-${3}-static -L ${1}/target" HEADLESS=true NOOPT=true STATIC_BUILD=true
+MOD_ENVIRONMENT = AR=${1}/host/usr/bin/${2}-gcc-ar CC=${1}/host/usr/bin/${2}-gcc CPP=${1}/host/usr/bin/${2}-cpp CXX=${1}/host/usr/bin/${2}-g++ LD=${1}/host/usr/bin/${2}-ld PKG_CONFIG=${1}/host/usr/bin/pkg-config STRIP=${1}/host/usr/bin/${2}-strip CFLAGS="-I${1}/staging/usr/include" CPPFLAGS= CXXFLAGS="-I${1}/staging/usr/include" LDFLAGS="-L${1}/staging/usr/lib" \ EXE_WRAPPER="qemu-${3}-static -L ${1}/target" HEADLESS=true MOD_BUILD=true NOOPT=true STATIC_BUILD=true
 
 modduo:
 	$(MAKE) $(call MOD_ENVIRONMENT,$(MOD_WORKDIR)/modduo-static,arm-mod-linux-gnueabihf.static,arm)
diff --git a/deps/Makefile b/deps/Makefile
index b1bef04..9f4fa0c 100644
--- a/deps/Makefile
+++ b/deps/Makefile
@@ -18,6 +18,12 @@ BASE_FLAGS += -DZSTDLIB_VISIBILITY=
 BASE_FLAGS += -I../include
 BASE_FLAGS += -I../include/neon-compat
 
+ifeq ($(HEADLESS),true)
+ifeq ($(WITH_LTO),true)
+BASE_FLAGS += -ffat-lto-objects
+endif
+endif
+
 ifeq ($(WASM),true)
 BASE_FLAGS += -msse -msse2 -msse3 -msimd128
 else
diff --git a/plugins/Makefile b/plugins/Makefile
index 01f7268..cf4e79e 100644
--- a/plugins/Makefile
+++ b/plugins/Makefile
@@ -748,6 +748,9 @@ endif
 
 ifeq ($(HEADLESS),true)
 BASE_FLAGS += -DHEADLESS
+ifeq ($(WITH_LTO),true)
+BASE_FLAGS += -ffat-lto-objects
+endif
 endif
 
 ifeq ($(WASM),true)
diff --git a/src/Makefile b/src/Makefile
index 1b821c4..5204e07 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -62,6 +62,9 @@ endif
 
 ifeq ($(HEADLESS),true)
 BASE_FLAGS += -DHEADLESS
+ifeq ($(WITH_LTO),true)
+BASE_FLAGS += -ffat-lto-objects
+endif
 endif
 
 ifeq ($(WASM),true)
@@ -148,9 +151,13 @@ endif
 TARGET = rack.a
 
 all: $(TARGET)
+ifeq ($(MOD_BUILD),true)
+	$(MAKE) -C CardinalFX lv2 resources
+else
 	$(MAKE) -C CardinalFX
 	$(MAKE) -C CardinalSynth
 	$(MAKE) -C Cardinal
+endif
 
 resources:
 	$(MAKE) resources -C Cardinal
diff --git a/src/Makefile.cardinal.mk b/src/Makefile.cardinal.mk
index 9ea22c5..ba9df5b 100644
--- a/src/Makefile.cardinal.mk
+++ b/src/Makefile.cardinal.mk
@@ -159,6 +159,9 @@ BASE_FLAGS += -pthread
 
 ifeq ($(HEADLESS),true)
 BASE_FLAGS += -DHEADLESS
+ifeq ($(WITH_LTO),true)
+BASE_FLAGS += -ffat-lto-objects
+endif
 endif
 
 ifeq ($(WASM),true)