2 files changed, 9 insertions, 3 deletions
diff --git a/pkgs/build-support/pkg-config-wrapper/add-flags.sh b/pkgs/build-support/pkg-config-wrapper/add-flags.sh
index 35ecf62ca23..90aee712be6 100644
--- a/pkgs/build-support/pkg-config-wrapper/add-flags.sh
+++ b/pkgs/build-support/pkg-config-wrapper/add-flags.sh
@@ -6,7 +6,7 @@ var_templates_list=(
 accumulateRoles
 
 for var in "${var_templates_list[@]}"; do
-    mangleVarList "$var" ${role_suffixes[@]+"${role_suffixes[@]}"}
+    mangleVarListGeneric ":" "$var" ${role_suffixes[@]+"${role_suffixes[@]}"}
 done
 
 export NIX_PKG_CONFIG_WRAPPER_FLAGS_SET_@suffixSalt@=1
diff --git a/pkgs/build-support/wrapper-common/utils.bash b/pkgs/build-support/wrapper-common/utils.bash
index 66b7c3f3e83..f773270f7de 100644
--- a/pkgs/build-support/wrapper-common/utils.bash
+++ b/pkgs/build-support/wrapper-common/utils.bash
@@ -13,7 +13,9 @@ accumulateRoles() {
     fi
 }
 
-mangleVarList() {
+mangleVarListGeneric() {
+    local sep="$1"
+    shift
     local var="$1"
     shift
     local -a role_suffixes=("$@")
@@ -25,11 +27,15 @@ mangleVarList() {
     for suffix in "${role_suffixes[@]}"; do
         local inputVar="${var}${suffix}"
         if [ -v "$inputVar" ]; then
-            export ${outputVar}+="${!outputVar:+ }${!inputVar}"
+            export ${outputVar}+="${!outputVar:+$sep}${!inputVar}"
         fi
     done
 }
 
+mangleVarList() {
+    mangleVarListGeneric " " "$@"
+}
+
 mangleVarBool() {
     local var="$1"
     shift