diff --git a/.drone.yml b/.drone.yml
index 8c3f273..c7c1315 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -15,12 +15,12 @@ steps:
   - name: version-minimal
     image: debian:buster-slim
     commands:
-      - source unit/version && echo "${NXT_VERSION}-minimal" > .tags
+      - bash -c 'source unit/version && echo "${NXT_VERSION}-minimal" > .tags'
 
   - name: latest-minimal
     image: debian:buster-slim
     commands:
-      - source unit/version && echo "latest-minimal" >> .tags
+      - bash -c 'source unit/version && echo "latest-minimal" >> .tags'
     when:
       branch:
         - master
@@ -40,12 +40,12 @@ steps:
   - name: version-php7.3
     image: debian:buster-slim
     commands:
-      - source unit/version && echo "${NXT_VERSION}-php7.3" > .tags
+      - bash -c 'source unit/version && echo "${NXT_VERSION}-php7.3" > .tags'
 
   - name: latest-php7.3
     image: debian:buster-slim
     commands:
-      - source unit/version && echo "latest-php7.3" >> .tags
+      - bash -c 'source unit/version && echo "latest-php7.3" >> .tags'
     when:
       branch:
         - master