diff --git a/Justfile b/Justfile
index 3fd51782c..6cde142c3 100644
--- a/Justfile
+++ b/Justfile
@@ -547,8 +547,8 @@ INSTALLING:
     for e in hledger hledger-ui hledger-web ; do mv bin/old/$e bin/old/$e-{{ VER }}; echo "bin/old/$e-{{ VER }}"; done
 
 # install the hledger executables with ghc-debug support to bin/hledger*-dbg
-@installdbg:
-    $STACK install --local-bin-path bin --flag hledger-lib:ghcdebug --flag hledger:ghcdebug --flag hledger-ui:ghcdebug --flag hledger-web:ghcdebug
+@installdbg *STACKARGS:
+    $STACK install --local-bin-path bin --flag '*:ghcdebug' {{ STACKARGS }}
     for e in hledger hledger-ui hledger-web ; do mv bin/$e bin/$e-dbg; echo "bin/$e-dbg"; done
 
 # # make must be GNU Make 4.3+
diff --git a/doc/DEVFAQ.md b/doc/DEVFAQ.md
index bb6c117cf..783c01d48 100644
--- a/doc/DEVFAQ.md
+++ b/doc/DEVFAQ.md
@@ -59,7 +59,7 @@ You might need to stop background builders like HLS, to avoid a fight over the b
 
 Then build lib and executable(s) with the `ghcdebug` flag:
 ```cli
-$ stack build --flag hledger-lib:ghcdebug --flag hledger:ghcdebug --flag hledger-ui:ghcdebug --flag hledger-web:ghcdebug
+$ stack build --flag='*:ghcdebug'
 ```
 
 When the build is right, --version should mention ghc-debug: