diff --git a/script/uberjar b/script/uberjar
index 880aba4e..cef77020 100755
--- a/script/uberjar
+++ b/script/uberjar
@@ -140,7 +140,7 @@ else
     BABASHKA_LEIN_PROFILES+=",-feature/test-check"
 fi
 
-if [ "$BABASHKA_FEATURE_SPEC_ALPHA" = "true" ]
+if [ "$BABASHKA_FEATURE_SPEC_ALPHA" != "false" ]
 then
     BABASHKA_LEIN_PROFILES+=",+feature/spec-alpha"
 else
diff --git a/script/uberjar.bat b/script/uberjar.bat
index 2ae3beb6..457fffdf 100755
--- a/script/uberjar.bat
+++ b/script/uberjar.bat
@@ -106,7 +106,7 @@ set BABASHKA_LEIN_PROFILES=%BABASHKA_LEIN_PROFILES%,+feature/test-check
 set BABASHKA_LEIN_PROFILES=%BABASHKA_LEIN_PROFILES%,-feature/test-check
 )
 
-if "%BABASHKA_FEATURE_SPEC_ALPHA%"=="true" (
+if not "%BABASHKA_FEATURE_SPEC_ALPHA%"=="false" (
 set BABASHKA_LEIN_PROFILES=%BABASHKA_LEIN_PROFILES%,+feature/spec-alpha
 ) else (
 set BABASHKA_LEIN_PROFILES=%BABASHKA_LEIN_PROFILES%,-feature/spec-alpha