diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
index acbdd982fd..f786b70434 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
@@ -112,6 +112,8 @@ module Superenv
     end
     generic_setup_build_environment(formula)
 
+    self["PKG_CONFIG"] = Superenv.bin/"pkg-config"
+
     # Filter out symbols known not to be defined since GNU Autotools can't
     # reliably figure this out with Xcode 8 and above.
     if MacOS.version == "10.12" && MacOS::Xcode.version >= "9.0"
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.14/libcurl.pc b/Library/Homebrew/os/mac/pkgconfig/10.14/libcurl.pc
index ff7a29ee24..9b38135629 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.14/libcurl.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.14/libcurl.pc
@@ -23,8 +23,8 @@
 # This should most probably benefit from getting a "Requires:" field added
 # dynamically by configure.
 #
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 supported_protocols="DICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAPS LDAP LDAPS POP3 POP3S RTSP SMB SMBS SMTP SMTPS TELNET TFTP"
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.14/libexslt.pc b/Library/Homebrew/os/mac/pkgconfig/10.14/libexslt.pc
index 16276f7156..38b191fc33 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.14/libexslt.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.14/libexslt.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.14/libxml-2.0.pc b/Library/Homebrew/os/mac/pkgconfig/10.14/libxml-2.0.pc
index c297c6b454..d0dc6b36ff 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.14/libxml-2.0.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.14/libxml-2.0.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 modules=1
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.14/libxslt.pc b/Library/Homebrew/os/mac/pkgconfig/10.14/libxslt.pc
index 92d07a988c..05536f408e 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.14/libxslt.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.14/libxslt.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.14/sqlite3.pc b/Library/Homebrew/os/mac/pkgconfig/10.14/sqlite3.pc
index d7eefa4b5c..167eb8446b 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.14/sqlite3.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.14/sqlite3.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.14/uuid.pc b/Library/Homebrew/os/mac/pkgconfig/10.14/uuid.pc
index f5c6851ebe..20b05cc51b 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.14/uuid.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.14/uuid.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 sharedlibdir=${libdir}
 includedir=${prefix}/include
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.14/zlib.pc b/Library/Homebrew/os/mac/pkgconfig/10.14/zlib.pc
index 837bb70ac3..a18584595e 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.14/zlib.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.14/zlib.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 sharedlibdir=${libdir}
 includedir=${prefix}/include
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.15/libcurl.pc b/Library/Homebrew/os/mac/pkgconfig/10.15/libcurl.pc
index a7bbaa0478..b96817e7cb 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.15/libcurl.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.15/libcurl.pc
@@ -23,8 +23,8 @@
 # This should most probably benefit from getting a "Requires:" field added
 # dynamically by configure.
 #
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 supported_protocols="DICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAPS LDAP LDAPS POP3 POP3S RTSP SMB SMBS SMTP SMTPS TELNET TFTP"
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.15/libexslt.pc b/Library/Homebrew/os/mac/pkgconfig/10.15/libexslt.pc
index 16276f7156..38b191fc33 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.15/libexslt.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.15/libexslt.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.15/libxml-2.0.pc b/Library/Homebrew/os/mac/pkgconfig/10.15/libxml-2.0.pc
index c297c6b454..d0dc6b36ff 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.15/libxml-2.0.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.15/libxml-2.0.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 modules=1
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.15/libxslt.pc b/Library/Homebrew/os/mac/pkgconfig/10.15/libxslt.pc
index 92d07a988c..05536f408e 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.15/libxslt.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.15/libxslt.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.15/sqlite3.pc b/Library/Homebrew/os/mac/pkgconfig/10.15/sqlite3.pc
index 2e68dbac0b..11ef0fdb37 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.15/sqlite3.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.15/sqlite3.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.15/uuid.pc b/Library/Homebrew/os/mac/pkgconfig/10.15/uuid.pc
index f5c6851ebe..20b05cc51b 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.15/uuid.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.15/uuid.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 sharedlibdir=${libdir}
 includedir=${prefix}/include
diff --git a/Library/Homebrew/os/mac/pkgconfig/10.15/zlib.pc b/Library/Homebrew/os/mac/pkgconfig/10.15/zlib.pc
index 837bb70ac3..a18584595e 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.15/zlib.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.15/zlib.pc
@@ -1,5 +1,5 @@
-prefix=/usr
-exec_prefix=${prefix}
+prefix=${homebrew_sdkroot}/usr
+exec_prefix=/usr
 libdir=${exec_prefix}/lib
 sharedlibdir=${libdir}
 includedir=${prefix}/include
diff --git a/Library/Homebrew/shims/mac/super/pkg-config b/Library/Homebrew/shims/mac/super/pkg-config
new file mode 100755
index 0000000000..ceb5b1b775
--- /dev/null
+++ b/Library/Homebrew/shims/mac/super/pkg-config
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+exec "$HOMEBREW_OPT/pkg-config/bin/pkg-config" \
+  "--define-variable=homebrew_sdkroot=$HOMEBREW_SDKROOT" \
+  "$@"