diff --git a/core/src/actions/build.ts b/core/src/actions/build.ts
index 300e68afec..dc4ffd9e7c 100644
--- a/core/src/actions/build.ts
+++ b/core/src/actions/build.ts
@@ -70,7 +70,10 @@ export const copyFromSchema = createSchema({
       .description(
         "POSIX-style path or filename of the directory or file(s) to copy to the target, relative to the build path of the source build."
       ),
-    targetPath: joi.posixPath().subPathOnly().default("").description(dedent`
+    targetPath: joi
+      .posixPath()
+      .subPathOnly()
+      .default((parent) => parent.sourcePath).description(dedent`
       POSIX-style path or filename to copy the directory or file(s), relative to the build directory.
       Defaults to to same as source path.
     `),
diff --git a/docs/reference/action-types/Build/container.md b/docs/reference/action-types/Build/container.md
index ed38b641d0..fb113925c4 100644
--- a/docs/reference/action-types/Build/container.md
+++ b/docs/reference/action-types/Build/container.md
@@ -146,7 +146,7 @@ copyFrom:
 
     # POSIX-style path or filename to copy the directory or file(s), relative to the build directory.
     # Defaults to to same as source path.
-    targetPath: ''
+    targetPath:
 
 # Specify a list of POSIX-style paths or globs that should be included as the build context for the Build, and will
 # affect the computed _version_ of the action.
@@ -422,9 +422,9 @@ POSIX-style path or filename of the directory or file(s) to copy to the target,
 POSIX-style path or filename to copy the directory or file(s), relative to the build directory.
 Defaults to to same as source path.
 
-| Type        | Default | Required |
-| ----------- | ------- | -------- |
-| `posixPath` | `""`    | No       |
+| Type        | Required |
+| ----------- | -------- |
+| `posixPath` | No       |
 
 ### `include[]`
 
diff --git a/docs/reference/action-types/Build/exec.md b/docs/reference/action-types/Build/exec.md
index 0fde293d52..2d69c802ed 100644
--- a/docs/reference/action-types/Build/exec.md
+++ b/docs/reference/action-types/Build/exec.md
@@ -146,7 +146,7 @@ copyFrom:
 
     # POSIX-style path or filename to copy the directory or file(s), relative to the build directory.
     # Defaults to to same as source path.
-    targetPath: ''
+    targetPath:
 
 # Specify a list of POSIX-style paths or globs that should be included as the build context for the Build, and will
 # affect the computed _version_ of the action.
@@ -426,9 +426,9 @@ POSIX-style path or filename of the directory or file(s) to copy to the target,
 POSIX-style path or filename to copy the directory or file(s), relative to the build directory.
 Defaults to to same as source path.
 
-| Type        | Default | Required |
-| ----------- | ------- | -------- |
-| `posixPath` | `""`    | No       |
+| Type        | Required |
+| ----------- | -------- |
+| `posixPath` | No       |
 
 ### `include[]`
 
diff --git a/docs/reference/action-types/Build/jib-container.md b/docs/reference/action-types/Build/jib-container.md
index aea46e1b2b..23b7d1a58f 100644
--- a/docs/reference/action-types/Build/jib-container.md
+++ b/docs/reference/action-types/Build/jib-container.md
@@ -158,7 +158,7 @@ copyFrom:
 
     # POSIX-style path or filename to copy the directory or file(s), relative to the build directory.
     # Defaults to to same as source path.
-    targetPath: ''
+    targetPath:
 
 # Specify a list of POSIX-style paths or globs that should be included as the build context for the Build, and will
 # affect the computed _version_ of the action.
@@ -496,9 +496,9 @@ POSIX-style path or filename of the directory or file(s) to copy to the target,
 POSIX-style path or filename to copy the directory or file(s), relative to the build directory.
 Defaults to to same as source path.
 
-| Type        | Default | Required |
-| ----------- | ------- | -------- |
-| `posixPath` | `""`    | No       |
+| Type        | Required |
+| ----------- | -------- |
+| `posixPath` | No       |
 
 ### `include[]`