diff --git a/.github/workflows/make-apk.yml b/.github/workflows/make-apk.yml
index 6457576..3f872ba 100644
--- a/.github/workflows/make-apk.yml
+++ b/.github/workflows/make-apk.yml
@@ -9,19 +9,6 @@ jobs:
   Build-Apk:
     runs-on: ubuntu-latest
     steps:
-    - name: Cache fontforge and extra dependencies
-      uses: actions/cache@v2
-      with:
-        path: /usr/local/bin
-        key: usr-local-bin
-    - name: Install latest FontForge version (using AppImage)
-      run: |
-        # Get most recent version of FontForge
-        # Using AppImage there is no dependecy problem, it is the latest version and it's easier to cache
-        cd /usr/local/bin
-        sudo wget -c -N https://github.com/fontforge/fontforge/releases/download/20220308/FontForge-2022-03-08-582bd41-x86_64.AppImage
-        sudo chmod +x ./FontForge-2022-03-08-582bd41-x86_64.AppImage
-        sudo ln --symbolic --force /usr/local/bin/FontForge-2022-03-08-582bd41-x86_64.AppImage /usr/local/bin/fontforge
     - uses: actions/setup-java@v2
       with:
         distribution: 'zulu' # See 'Supported distributions' for available options
@@ -36,11 +23,11 @@ jobs:
     - name: Restore debug keystore from github Secrets 
       run: |
         mkdir -p _build
-        cd "$GITHUB_WORKSPACE/_build"
+        cd "_build"
         # Check if exist and use the secret named DEBUG_KEYSTORE
         # The contents of the secret can be obtained -
         #    from the debug.keystore.asc from you local _build folder
-        if [[ ! "${{ secrets.DEBUG_KEYSTORE }}" == "" ]]; then
+        if [[ ! "${{ secrets.DEBUG_KEYSTORE }}" = "" ]]; then
             echo "${{ secrets.DEBUG_KEYSTORE }}" > "debug.keystore.asc"
             if [[ -s "debug.keystore.asc" ]]; then
                 gpg -d --passphrase "debug0" --batch "debug.keystore.asc" > "debug.keystore"
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bc4b288..4a107b1 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -11,9 +11,9 @@ Fortunately, there's not many dependencies:
 - OpenJDK 8
 - Android SDK: build tools (minimum `28.0.1`), platform `30`
 - Make sure to have the `$ANDROID_HOME` environment variable set.
-- FontForge version >= 20201107
 
-For Nix users, there's a `shell.nix` for setting-up the right environment.
+For Nix users, the right environment can be obtained with `nix-shell ./shell.nix`.
+Instructions to install Nix are [here](https://nixos.wiki/wiki/Nix_Installation_Guide).
 
 Building the debug apk:
 
@@ -21,11 +21,7 @@ Building the debug apk:
 make
 ```
 
-If the build succeed, the debug apk is located in
-`_build/juloo.keyboard2.debug.apk`.
-
-If the build doesn't succeeded check the FontForge version, the version needed is 20201107. 
-Try to use the nix-shell, instructions to install [here](https://nixos.wiki/wiki/Nix_Installation_Guide)
+If the build succeed, the debug apk is located in `_build/juloo.keyboard2.debug.apk`.
 
 ## Using the local debug.keystore on the Github CI actions
 
diff --git a/Makefile b/Makefile
index a606299..a731a0b 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,10 @@ clean:
 	rm -rf _build/*.dex _build/class _build/gen _build/*.apk _build/*.unsigned-apk \
 		_build/*.idsig _build/assets
 
-.PHONY: release debug installd clean
+rebuild_special_font:
+	cd srcs/special_font && fontforge -lang=ff -script build.pe *.svg
+
+.PHONY: release debug installd clean rebuild_special_font
 
 $(shell mkdir -p _build)
 
@@ -85,6 +88,11 @@ _build/%.unaligned-apk: $(addprefix _build/,$(APK_EXTRA_FILES)) $(MANIFEST_FILE)
 		-I $(ANDROID_PLATFORM)/android.jar -F "$@" $(AAPT_PACKAGE_FLAGS)
 	cd $(@D) && $(ANDROID_BUILD_TOOLS)/aapt add $(@F) $(APK_EXTRA_FILES)
 
+# Copy the special font file into _build because aapt requires relative paths
+_build/assets/special_font.ttf: srcs/special_font/result.ttf
+	mkdir -p $(@D)
+	cp "$<" "$@"
+
 # R.java
 
 GEN_DIR = _build/gen
@@ -95,15 +103,6 @@ $(R_FILE): $(RES_FILES) $(MANIFEST_FILE)
 	$(ANDROID_BUILD_TOOLS)/aapt package -f -m -S $(RES_DIR) -J $(GEN_DIR) \
 		-M $(MANIFEST_FILE) -I $(ANDROID_PLATFORM)/android.jar
 
-# Special font
-
-SPECIAL_FONT_GLYPHS = $(wildcard $(CURDIR)/srcs/special_font/*.svg)
-SPECIAL_FONT_SCRIPT = $(CURDIR)/srcs/special_font/build.pe
-
-_build/assets/special_font.ttf: $(SPECIAL_FONT_SCRIPT) $(SPECIAL_FONT_GLYPHS)
-	mkdir -p $(@D)
-	fontforge -lang=ff -script $(SPECIAL_FONT_SCRIPT) $(CURDIR)/$@ $(SPECIAL_FONT_GLYPHS)
-
 # Compile java classes and build classes.dex
 
 OBJ_DIR = _build/class
diff --git a/srcs/special_font/build.pe b/srcs/special_font/build.pe
index 4e2754d..962917f 100644
--- a/srcs/special_font/build.pe
+++ b/srcs/special_font/build.pe
@@ -3,7 +3,7 @@
 New()
 
 # Imports glyphs, file name is position in the font.
-i = 2
+i = 1
 while (i < $argc)
   Select(Strtol($argv[i]:t:r, 16))
   Import($argv[i], 0, 0, 4.0, 0.1)
@@ -11,4 +11,4 @@ while (i < $argc)
   i++
 endloop
 
-Generate($1)
+Generate("result.ttf")
diff --git a/srcs/special_font/result.ttf b/srcs/special_font/result.ttf
new file mode 100644
index 0000000..8434a3f
Binary files /dev/null and b/srcs/special_font/result.ttf differ