diff --git a/GNUmakefile b/GNUmakefile
index ae772608..cec46f60 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -616,7 +616,7 @@ $(IOS_TARGETS) $(IOSSIM_TARGETS): LDFLAGS += \
 
 unix: debug release
 win: windebug winrelease
-all: $(BUILD_TYPES) default.nix
+all: $(BUILD_TYPES)
 .PHONY: all win unix
 
 ALL_APP_OBJS := \
@@ -673,10 +673,6 @@ src/android/AndroidManifest.xml : $(firstword $(MAKEFILE_LIST))
 		-e 's/android:targetSdkVersion="[[:digit:]]*"/android:targetSdkVersion="$(ANDROID_TARGET_SDK_VERSION)"/' \
 		$@
 
-default.nix : $(firstword $(MAKEFILE_LIST))
-	@echo "[version] $@"
-	@sed -i -e 's/version = ".*";/version = "$(VERSION_NUMBER)";/' $@
-
 # Android support.
 out/res/layout_activity_main.xml.flat: src/android/res/layout/activity_main.xml
 	@mkdir -p $(dir $@)
@@ -862,7 +858,7 @@ clean:
 	rm -rf $(BUILD_DIR)
 .PHONY: clean
 
-dist: release-apk iosrelease-ipa $(if $(HAVE_WIN), out/winrelease/tildefriends.standalone.exe) default.nix
+dist: release-apk iosrelease-ipa $(if $(HAVE_WIN), out/winrelease/tildefriends.standalone.exe)
 	@echo [archive] dist/tildefriends-$(VERSION_NUMBER).tar.xz
 	@rm -rf out/tildefriends-$(VERSION_NUMBER)
 	@mkdir -p dist/ out/tildefriends-$(VERSION_NUMBER)