openfga/sdk-generator weird failures when building early version of Java SDK

gistfile1.txt

$ make build-client-java
make build-client sdk_language=java tmpdir=/var/folders/_d/3x013d_12h91n1nw93f18tp00000gp/T//tmp.qJciG
cat: ./clients/fga-dotnet-sdk/VERSION.txt: No such file or directory
mkdir -p "/Users/justin.hill/workplace/sdk-generator-two/docs/openapi/" "/Users/justin.hill/workplace/sdk-generator-two/clients/"
cat: ./clients/fga-dotnet-sdk/VERSION.txt: No such file or directory
mkdir -p "/Users/justin.hill/workplace/sdk-generator-two/docs/openapi"
cat: ./clients/fga-dotnet-sdk/VERSION.txt: No such file or directory
curl "https://raw.githubusercontent.com/openfga/api/main/docs/openapiv2/apidocs.swagger.json" \
	     -o "/Users/justin.hill/workplace/sdk-generator-two/docs/openapi/openfga.openapiv2.raw.json"
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 63073  100 63073    0     0   247k      0 --:--:-- --:--:-- --:--:--  253k
cat "/Users/justin.hill/workplace/sdk-generator-two/docs/openapi/openfga.openapiv2.raw.json" | \
		docker run --rm -i stedolan/jq \
		 '(.. | .tags? | select(.)) |= ["OpenFga"] | (.tags? | select(.)) |= [{"name":"OpenFga"}] | del(.definitions.ReadTuplesParams, .definitions.ReadTuplesResponse, .paths."/stores/{store_id}/read-tuples", .definitions.StreamedListObjectsRequest, .definitions.StreamedListObjectsResponse, .paths."/stores/{store_id}/streamed-list-objects")' > \
		/Users/justin.hill/workplace/sdk-generator-two/docs/openapi/openfga.openapiv2.json
cat: ./clients/fga-dotnet-sdk/VERSION.txt: No such file or directory
sed -i -e 's/v1.//g' /Users/justin.hill/workplace/sdk-generator-two/docs/openapi/openfga.openapiv2.json
SDK_LANGUAGE="java" TMP_DIR="/var/folders/_d/3x013d_12h91n1nw93f18tp00000gp/T//tmp.qJciG" LIBRARY_TEMPLATE="" \
		./scripts/build_client.sh
cat: ./clients/fga-dotnet-sdk/VERSION.txt: No such file or directory
cat: ./config/clients/java/generator.txt: No such file or directory
[error] The spec file is not found: /docs/openapi/openfga.openapiv2.json
[error] Check the path of the OpenAPI spec and try again.
make[1]: *** [build-client] Error 1
make: *** [build-client-java] Error 2