diff --git a/build.sh b/build.sh
index c4b9093..be61664 100755
--- a/build.sh
+++ b/build.sh
@@ -4,12 +4,9 @@ EXEC=dam
 
 test_function() {
     functionList=(${@})
+    source src/env
     for function in ${functionList[@]}; do
-        echo -e "#!/bin/bash\n" > .test.sh
-        awk '!/^ *#/ && NF' src/env >> .test.sh
-        awk '!/^ *#/ && NF' ${function} >> .test.sh
-        bash .test.sh
-        rm .test.sh
+        bash ${function}
     done
 }
 
@@ -43,7 +40,7 @@ gen_parser() {
     awk '!/^ *#/ && NF' src/parser
 }
 
-test_function  $(find src/ -type f -not -name env -not -name parser) >> ${EXEC}
+test_function  $(find src/ -type f -not -name env -not -name parser)
 
 gen_env > ${EXEC}
 gen_help >> ${EXEC}