diff --git a/pkgs/development/compilers/ghc-6.6.1/setup-hook.sh b/pkgs/development/compilers/ghc-6.6.1/setup-hook.sh
index c6f769a0040a..03057e82f4af 100644
--- a/pkgs/development/compilers/ghc-6.6.1/setup-hook.sh
+++ b/pkgs/development/compilers/ghc-6.6.1/setup-hook.sh
@@ -13,7 +13,7 @@ makeWrapper() {
   wrapper="$ghc_support/$wrapperName"
   shift #the other arguments are passed to the source app
   echo '#!'"$SHELL" > "$wrapper"
-  echo "exec \"@out@/bin/$wrapperName\" $@" '"$@"' > "$wrapper"
+  echo "exec \"@out@/bin/$wrapperName\" $@" '"$@"' >> "$wrapper"
   chmod +x "$wrapper"
 }
 
diff --git a/pkgs/development/compilers/ghc-6.6/setup-hook.sh b/pkgs/development/compilers/ghc-6.6/setup-hook.sh
index 23da6de03825..b8441abc98a7 100644
--- a/pkgs/development/compilers/ghc-6.6/setup-hook.sh
+++ b/pkgs/development/compilers/ghc-6.6/setup-hook.sh
@@ -13,7 +13,7 @@ makeWrapper() {
   wrapper="$ghc_support/$wrapperName"
   shift #the other arguments are passed to the source app
   echo '#!'"$SHELL" > "$wrapper"
-  echo "exec \"$ghc/bin/$wrapperName\" $@" '"$@"' > "$wrapper"
+  echo "exec \"$ghc/bin/$wrapperName\" $@" '"$@"' >> "$wrapper"
   chmod +x "$wrapper"
 }
 
diff --git a/pkgs/development/compilers/ghc-6.8/setup-hook.sh b/pkgs/development/compilers/ghc-6.8/setup-hook.sh
index de4bf2192ff4..faadc6b860e3 100644
--- a/pkgs/development/compilers/ghc-6.8/setup-hook.sh
+++ b/pkgs/development/compilers/ghc-6.8/setup-hook.sh
@@ -13,7 +13,7 @@ makeWrapper() {
   wrapper="$ghc_support/$wrapperName"
   shift #the other arguments are passed to the source app
   echo '#!'"$SHELL" > "$wrapper"
-  echo "exec \"@out@/bin/$wrapperName\" $@" '"$@"' > "$wrapper"
+  echo "exec \"@out@/bin/$wrapperName\" $@" '"$@"' >> "$wrapper"
   chmod +x "$wrapper"
 }