diff --git a/metadata/org.deluge.trireme.txt b/metadata/org.deluge.trireme.txt
index d704acf33d..0e654d6487 100644
--- a/metadata/org.deluge.trireme.txt
+++ b/metadata/org.deluge.trireme.txt
@@ -41,10 +41,10 @@ Build:0.9.1,7
     commit=v0.9.1
     output=build/app/outputs/apk/fdroid/release/app-fdroid-release.apk
     srclibs=flutter@beta
-    prebuild=sed -i -e 's|git@github.com:|https://github.com/|' pubspec.lock pubspec.yaml
-    build=export PATH=$$flutter$$/bin:$PATH && \
-        flutter config --no-analytics && \
-        flutter build apk --flavor fdroid
+    prebuild=sed -i -e 's|git@github.com:|https://github.com/|' pubspec.lock pubspec.yaml && \
+        $$flutter$$/bin/flutter upgrade
+    build=$$flutter$$/bin/flutter config --no-analytics && \
+        $$flutter$$/bin/flutter build apk --flavor fdroid
 
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