diff --git a/build.sh b/build.sh
index aba54fd..2da096d 100755
--- a/build.sh
+++ b/build.sh
@@ -2,6 +2,8 @@
 
 set -eu
 
+printenv
+
 # strip https:// from the urls
 if ! [[ "$SRC_REPOSITORY" =~ ^https:// ]]; then
     echo "Only https git urls are supported now. Provided source git url: $SRC_REPOSITORY"
@@ -45,7 +47,10 @@ ARGS='--target x86_64-unknown-linux-musl'
 RUSTFLAGS=''
 TARGET_DIR="./target/$(rustc --print host-tuple)"
 
-if [[ "$OPT_RELEASE" != "true" ]] && [[ "$OPT_RELEASE" != "True" ]]; then
+if [[ "$OPT_RELEASE" == "true" ]] || [[ "$OPT_RELEASE" == "True" ]]; then
+    TARGET_DIR="$TARGET_DIR/release"
+    ARGS="$ARGS --release"
+else
     TARGET_DIR="$TARGET_DIR/debug"
 fi
 
@@ -53,7 +58,6 @@ if [[ "$OPT_BUILD_STD" == "true" ]] || [[ "$OPT_BUILD_STD" == "True" ]]; then
     RUSTFLAGS="$RUSTFLAGS -Lunwind -L/lib/musl/lib -Lcrt -Lxz -llzma"
     TOOLCHAIN='+nightly'
     ARGS="-Z build-std $ARGS"
-    TARGET_DIR="$TARGET_DIR/release"
 fi
 
 RUSTFLAGS=$RUSTFLAGS cargo $TOOLCHAIN b $ARGS -v