diff --git a/src/app/tape/tape.pro b/src/app/tape/tape.pro
index 6e96a3bc5..38ee8880f 100644
--- a/src/app/tape/tape.pro
+++ b/src/app/tape/tape.pro
@@ -155,12 +155,14 @@ DIAGRAMS += \
         $${PWD}/share/resources/diagrams/Qp2.svg \
         $${PWD}/share/resources/diagrams/Qp3.svg
 
-diagrams.name = resource diagrams
-diagrams.CONFIG += no_link target_predeps
-diagrams.depends = $$DIAGRAMS # expects a list of files
-diagrams.input = DATA_RESOURCE # expects the name of a variable
-diagrams.output = ${QMAKE_FILE_BASE}.rcc
-diagrams.commands = $$shell_path($$[QT_INSTALL_BINS]/rcc) -binary -no-compress ${QMAKE_FILE_IN} -o $${OUT_PWD}/$${DESTDIR}/${QMAKE_FILE_OUT}
+!exists($${OUT_PWD}/$${DESTDIR}/diagrams.rcc) {
+    diagrams.name = resource diagrams
+    diagrams.CONFIG += no_link target_predeps
+    diagrams.depends = $$DIAGRAMS # expects a list of files
+    diagrams.input = DATA_RESOURCE # expects the name of a variable
+    diagrams.output = ${QMAKE_FILE_BASE}.rcc
+    diagrams.commands = $$shell_path($$[QT_INSTALL_BINS]/rcc) -binary -no-compress ${QMAKE_FILE_IN} -o $${OUT_PWD}/$${DESTDIR}/${QMAKE_FILE_OUT}
+}
 
 QMAKE_EXTRA_COMPILERS += diagrams