diff --git a/imagefiles/build-and-install-curl.sh b/imagefiles/build-and-install-curl.sh
index 740a7a2..78c2113 100755
--- a/imagefiles/build-and-install-curl.sh
+++ b/imagefiles/build-and-install-curl.sh
@@ -10,7 +10,7 @@ source $MY_DIR/utils.sh
 # copied from https://github.com/pypa/manylinux/tree/master/docker/build_scripts
 #
 
-CURL_ROOT=curl-7_83_1
+CURL_ROOT=curl-7.83.1
 CURL_HASH=93fb2cd4b880656b4e8589c912a9fd092750166d555166370247f09d18f5d0c0
 CURL_DOWNLOAD_URL=https://curl.haxx.se/download
 
diff --git a/imagefiles/build-and-install-ninja.sh b/imagefiles/build-and-install-ninja.sh
index beacda5..64d3b68 100755
--- a/imagefiles/build-and-install-ninja.sh
+++ b/imagefiles/build-and-install-ninja.sh
@@ -31,14 +31,14 @@ if [[ -z "${NINJA_VERSION}" ]]; then
 fi
 
 # Download
-url="https://github.com/ninja-build/ninja/archive/${NINJA_VERSION}.tar.gz"
+url="https://github.com/ninja-build/ninja/archive/v${NINJA_VERSION}.tar.gz"
 
 curl --connect-timeout 30 \
     --max-time 10 \
     --retry 5 \
     --retry-delay 10 \
     --retry-max-time 30 \
-    -# -o ninja.tar.gz -LO "v$url"
+    -# -o ninja.tar.gz -LO "$url"
 
 mkdir ninja
 tar -xzvf ./ninja.tar.gz --strip-components=1 -C ./ninja